Answer: 48
Step-by-step explanation:
A researcher has run an experiment on the effects of early cognitive simulation on children and their school success at age 10 years. He wants to compare his sample results to the normal distribution (z-distribution), but he is not sure whether the population distribution is normal or not. He comes to you as an expert in statistics for advice. Can he do this? Why or why not? What conditions must be met?
The researcher can compare his sample results to the normal distribution (z-distribution) if certain conditions are met. In order to compare sample results to the normal distribution using the z-distribution, certain conditions must be met.
The most important condition is that the population distribution should be approximately normal or at least follow a symmetric distribution. This condition is necessary because the z-distribution assumes a normal distribution. If the population distribution deviates significantly from normality, the use of the z-distribution may not be appropriate.
To determine whether the population distribution is normal, the researcher can conduct tests of normality, such as the Shapiro-Wilk test or the Kolmogorov-Smirnov test, on the data collected. These tests can assess whether the data significantly deviate from a normal distribution. If the data is found to deviate from normality, alternative methods, such as non-parametric tests, may be more suitable for analyzing the results.
It is important for the researcher to carefully consider the assumptions and conditions necessary for using the z-distribution before proceeding with the comparison. If the population distribution is not normal or the assumptions are violated, alternative statistical approaches should be used to ensure accurate analysis and interpretation of the results.
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Raphael i h year old
a) Lily' age i Raphael' age divided by 3. Write an expreion in term of h for Lily' age
b) An expreion for Ethan' age i h6. Write a entence to decribe how Ethan' age compare with Raphael' age
a) When Lily's age is 20, and Raphael's age is divided by 3 then the expression of Lily's age in terms of h is h < 10.
b) Ethan's age is half of Raphael's age therefore, Ethan's age is half Raphael's age.
a) If Raphael is twice as old as his sister Lily, we can represent their ages as 2h and h, respectively, where h is Lily's age. The sum of their ages is less than 30, so we can write the equation:
2h + h < 30
Combining like terms, we get:
3h < 30
Dividing both sides by 3, we get:
h < 10
This is an expression of Lily's age in terms of h.
b) If Ethan's age is 16, and Raphael's age is twice Ethan's age, we can represent Raphael's age as 2 × 16 = 32.
Ethan's age is 16, which is half of Raphael's age of 32. Therefore, Ethan's age is half of Raphael's age.
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The question is -
Raphael is twice as old as his sister. The sum of their ages is less than 30.
a) Lily's age is 20, and Raphael's age is divided by 3. Write an expression in terms of h for Lily's age.
b) An expression for Ethan's age 16. Write a sentence to describe how Ethan's age compares with Raphael's age.
Find the missing side of each triangle. Round your answers to the nearest tenth if necessary.
x
12 mi
15 mi
A) 9 mi
C) 7.9 mi
B) 17 mi
D) 19 mi
Answer:
9 miles
Step-by-step explanation:
use Pythagoras theorem
15 squared - 12 squared = 81
square root of 81 is 9
Answer:
A. 9 mi.
Step-by-step explanation:
Here, use the Pythagorean Theorem, but leave "a" as it is.
a² + b² = c²
a² + 12² = 15²
a² + 144 = 225
a² = 225 - 144
a² = 81
a = √81
a = 9
The missing side is 9 miles long.
PLEASEEEE HELP MEEEE
Answer:
(0.5,0) , (-3,0) ,and (0,-1.5)
Step-by-step explanation:
Just look where the points touch the x- and y-axis.
It touches twice on the x- and once on the y-axis.
Hope that helps!
Find the dimensions of a rectangle (in m) with perimeter 84 m whose area is as large as possible. (Enter the dimensions as a comma-separated list.)
A. 14, 14 B. 12, 18 C. 10.5, 21 D. 7, 35
The rectangle with dimensions 21 m by 21 m has the largest area among rectangles with a perimeter of 84 m.
To find the dimensions of a rectangle with a perimeter of 84 m that maximizes the area, we need to use the properties of rectangles.
Let's assume the length of the rectangle is l and the width is w.
The perimeter of a rectangle is given by the formula: 2l + 2w = P, where P is the perimeter.
In this case, the perimeter is given as 84 m, so we can write the equation as: 2l + 2w = 84.
To maximize the area, we need to find the dimensions that satisfy this equation and give the largest possible value for the area. The area of a rectangle is given by the formula: A = lw.
Now we can solve the perimeter equation for l: 2l = 84 - 2w, which simplifies to l = 42 - w.
Substituting this expression for l into the area equation, we get: A = (42 - w)w.
To maximize the area, we can find the critical points by taking the derivative of the area equation with respect to w and setting it equal to zero:
dA/dw = 42 - 2w = 0.
Solving this equation, we find w = 21.
Substituting this value of w back into the equation l = 42 - w, we get l = 42 - 21 = 21.
Therefore, the dimensions of the rectangle that maximize the area are l = 21 m and w = 21 m.
In summary, the dimensions of the rectangle are 21 m by 21 m, so the answer is A. 21, 21.
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what is the area, in square feet, of an isosceles triangle whose vertex angle is $120^{\circ}$ and whose base is $20$ feet long? express your answer as a common fraction in simplest radical form.
Answer:
(100√3)/3 square feet
Step-by-step explanation:
You want the area of the isosceles triangle that has a vertex angle of 120° and a base of 20 feet.
AltitudeThe altitude divides the triangle into two 30-60-90 right triangles with a long side of half the base, or 10 ft. That means the altitude is 10/√3 ft.
AreaThe area is ...
A = 1/2bh
A = 1/2(20 ft)(10/√3 ft) = 100/√3 ft²
We usually want the radical in the numerator, so that would be ...
Area = (100√3)/3 ft²
How many total atoms are in 3 molecules of CO2 (carbon dioxide)?
Answer:
9
Step-by-step explanation:
there are 3 atoms in one co2 molecule. 3 x 3=9
Answer:
in three molecules of CO2 there are:
3 Carbon Atoms and 6 Oxygen Atoms
If your looking for the atoms in ONE molecule then there is:
One Carbon Atom and Two Oxygen Atoms
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A. Understand
The question is asking how much money is saved.
Given :
original price = 18795.50lowered price = 15250.95B. Plan
operation to be used here is subtractionthat is :
original price - lowered priceC. Solve
\(18795.50 - 15250.95\)\(3544.55\)Hence, savings = Php 3544.55
with a reserve requirement of 5% and an initial deposit of $400, what is the maximum total amount of money that will be in the money supply? assume that all currency is deposited in a bank 7 banks hold no excess reserves (rr=.05)
The maximum money supply with a 5% reserve requirement and a $400 initial deposit is $8,000.
How to find maximum money?To calculate the maximum total amount of money that will be in the money supply, we need to consider the money multiplier effect based on the reserve requirement.
The money multiplier is given by the formula: MM = 1 / reserve requirement.
Given that the reserve requirement is 5% (rr = 0.05), the money multiplier is MM = 1 / 0.05 = 20.
The initial deposit is $400.
To calculate the maximum total amount of money in the money supply, we multiply the initial deposit by the money multiplier:
Maximum Money Supply = Initial Deposit * Money Multiplier
= $400 * 20
= $8,000.
Therefore, the maximum total amount of money that will be in the money supply is $8,000 when the reserve requirement is 5% and all currency is deposited in banks with no excess reserves.
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4. Determine the standard and general equation of a plane containing the points \( (1,-1,2) \), \( (-3,4,-1) \) and \( (3,-2,5) \).
The standard equation of the plane is -5x - 23y - z + 18 = 0, and the general equation of the plane is x + (23/5)y + (1/5)z = 18.
The standard equation of a plane is:
Ax + By + Cz + D = 0
where A, B, C, and D are the coefficients of the plane and (x, y, z) is a point on the plane.
To find the standard equation of the plane, we can use the following steps:
Find a vector that is parallel to the plane.
Find the normal vector to the plane.
Substitute the values of the vector and the normal vector into the standard equation of the plane.
Step 1: Find a vector that is parallel to the plane.
We can find a vector that is parallel to the plane by subtracting any two points that lie on the plane. In this case, we can subtract the point ( (1,-1,2) ) from the point ( (-3,4,-1) ). This gives us the vector:
(-3 - 1, 4 - (-1), -1 - 2) = (-4, 5, -3)
Step 2: Find the normal vector to the plane.
The normal vector to the plane is perpendicular to the vector that is parallel to the plane. We can find the normal vector by taking the cross product of the vector that is parallel to the plane and any other vector that lies on the plane. In this case, we can take the cross product of the vector ( (-4, 5, -3) ) and the vector ( (3, -2, 5) ). This gives us the normal vector:
(-5, -23, -1)
Step 3: Substitute the values of the vector and the normal vector into the standard equation of the plane.
Now that we have the vector and the normal vector, we can substitute them into the standard equation of the plane. This gives us the following equation:
-5x - 23y - z + D = 0
We can substitute any point that lies on the plane into this equation to solve for D. In this case, we can substitute the point ( (1,-1,2) ). This gives us the following equation:
-5(1) - 23(-1) - 2 + D = 0
Solving for D, we get D = 18.
Therefore, the standard equation of the plane is:
-5x - 23y - z + 18 = 0
The general equation of the plane is:
(-5x - 23y - z) + 18 = 0
-5x - 23y - z = -18
x + (23/5)y + (1/5)z = 18
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multiple choice geometry helPppp
Answer: D
Step-by-step explanation:
Use SOHCAHTOA
We are given the opposite of the angle and the hypotenuse. We can use the sine function to acquire the value of x°.
sin(x) = 7/13
Take the inverse sine on both sides by using a calculator to get:
x = 32.58°
Answer:
32.58° that the answer hope this helps
can you solve for the missing angle
Answer:
25°
Step-by-step explanation:
25° because opposite angles are equal
the blue angle 25° is opposite the yellow angle x° making x=25°
Answer:
x = 25°
Step-by-step explanation:
We can see that the 25° and x° are vertical to each other and vertical angles are angles that are the same size and directly opposite each other thus they are equal!
which of the following sets of data would produce the largest value for an independent-measures t statistic? group of answer choices the two sample means are 10 and 20 with variances of 20 and 25. the two sample means are 10 and 12 with sample variances of 20 and 25. the two sample means are 10 and 12 with variances of 120 and 125. the two sample means are 10 and 12 with variances of 120 and 125.
The two sample means of 10 and 20 with variances of 20 and 25 will produce the largest value for an independent-measures t statistic.
An independent-measures t statistic is used to measure the differences between two independent groups. In this case, the two sample means are 10 and 20 with variances of 20 and 25. This will produce the largest value for an independent-measures t statistic because the larger the difference between the two sample means, the larger the t statistic will be. The larger the variance, the more spread out the data is which also results in a larger t statistic. Since the two sample means have a larger difference and the variances are also large, this will result in the largest value for an independent-measures t statistic.
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find the image of the point (-5,-2) under
HALP AFAP PLSSS
Figure A is a scale image of figure B. what is the value of x?
Using proportions, it is found that the value of x is of 5.
What is a proportion?A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
In this problem, since Figure A is a scale of Figure B, the side lengths are proportional, hence the following rule of three is established:
x/12.5 = 2/5
Applying cross multiplication:
5x = 25
x = 5.
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i need help please ill mark brainliest
find each missing angle, round to the nearest degree
The angle x of the right angle triangle is 19 degrees.
How to find the angles of a right triangle?A right triangle is a triangle that has one of its angles as 90 degrees. The sum of angles in a triangle is 180 degrees.
The angles of a right angle triangle can be found using trigonometric ratios as follows:
Hence,
sin x = opposite / hypotenuse
Therefore,
sin x = 8 / 24
sin x = 1 / 3
x = sin⁻¹ 0.33333333333
x = 19.4712206325
Therefore,
x = 19 degrees.
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please help me i desperately need it
Answer: Division property of equality
Step-by-step explanation:
Answer:
associative property of addition
Step-by-step explanation:
you always have to do what's in the Parenthesis first then move on to what's next in the PEMDAS.
Given the equations below what is the value of y-x?
3x+4=-5y+8
9x+11y=-8
Answer:
12
Step-by-step explanation:
If you solve the second equation and substiture to the first, you get y = 5, and x = -7.
5-(-7) = 5+7=12
What is the sum of the positive integers that are solutions of -3n +3 >-11?
Step-by-step explanation:
-3n + 3 > -11
-3n > -14
3n < 14
n < 14/3
14/3 = 4.66666666...
the only positive integers that are smaller than 4.666666... are
4, 3, 2, 1
their sum is
4+3+2+1 = 10
Find the missing angle in the figure below.
Answer:
it is 108
Step-by-step explanation:
you know that the 53 angle is also inside the triangle and that 180-125 gives you the second angle 55. you than calculate that the last inner angle is 72 and substract that from 180.
Answer:
108 degrees
Step-by-step explanation:
lets imagine that pqr are the angles of the triangle
<rpq=53°(opposite<)
for <prq 180°-125°(< on a straight line)=55°
<pqr= a+b+c
= 55°+53°+c= 180°(< in a ∆)
= 108°+c =180°
collect like terms
c= 108°-108°
c= 72°
Therefore<pqr= 72°
for the unknown angle which is x
55+53=108( the two sides are facing the exterior <)
Nai's dog eats about 1(3)/(4) cups of dog food per day. If Nai has 12(1)/(3) cups of dog food left, about how many days can Nai feed his dog before having to buy more?
Answer:
7 days
Step-by-step explanation:
What you have to do is divide 12(1)/(3) by 1(3)/(4)... the best way to do that is first turn them into exact form.
12(1)/(3) --> 12*3 plus 1= 37/3 (the denominator stays the same)
1(3)/(4) --> 1*4 plus 3= 7/4
Then you have (37/3) over (7/4), from this point you switch the numerator and the denominator on the second fraction so that you can multiply both equations. (7/4) --> (4/7)
(37/3) * (4/7) = (148/21)
When simplified... 7(1)/(21)... and since you want to know full days, you only take 7
A small airplane can hold 44 passengers. Fifteen passengers board the plane.
a. Identify an inequality that represents the additional number of passengers, p, that can board the plane.
Responses
15+p<4415+p<44
p−44≤15p minus 44 is less than or equal to 15
15+p≥4415 plus p is greater than or equal to 44
15+p≤4415 plus p is less than or equal to 44
Question 2
Solve the inequality.
The solution is
.
Question 3
b. Which best explains whether or not 30 more passengers can board the plane?
Responses
30 more passengers cannot board the plane. Only 29 more passengers can board the plane.
30 more passengers cannot board the , plane., Only 29 more passengers can board , the plane.
30 more passengers can board the plane. 44 more passengers can board the plane.
30 more passengers can board the , plane., 44 more passengers can board , the plane.
30 more passengers cannot board the plane. Only 15 more passengers can board the plane.
30 more passengers cannot board the , plane., Only 15 more passengers can board , the plane.
30 more passengers can board the plane. 59 more passengers can board the plane.
30 more passengers can board the , plane., 59 more passengers can board , the plane.
a. The inequality that represents the additional number of passengers, p, that can board the plane will be D. 15+p≤44 15 plus p is less than or equal to 44
b. The option that represents the people who can board the plane is A. 30 more passengers cannot board the plane. Only 29 more passengers can board the plane.
How to calculate the value?From the information, the small airplane can hold 44 passengers. Fifteen passengers board the plane.
Let P = those that can board the plane.
P + 15 ≤ 44
Collect like terms
P ≤ 44 - 15
P ≤ 29
The highest number of passengers that can enter the plane is 29.
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Write an expression to represent the perimeter of Melissa’s garden in terms of x.
Type the correct answer in each box. Use numerals instead of words.
As no diagrams attached provided the formulas which can helps you to solve by yourself
Square--4(side)Rectangle--2(Length+Breadth)Triangle--(Sum of 3 sides)Any quadrilateral--(sum of 4 sides)The expression to represent the perimeter of Melissa’s garden in terms of x is P = 8x + 14
Perimeter of a rectangleThe formula for calculating the perimeter of a rectangle is given as
P = 2(x+ y)
where;
x = 3x + 2
y = x + 5
Substitute
P = 2(3x + 2 + x + 5)
P = 2(4x + 7)
P = 8x + 14
Hence the expression to represent the perimeter of Melissa’s garden in terms of x is P = 8x + 14
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Explain how the tangents of complementary angles are related.
Answer:
tan(α) = 1/tan(90°-α)
Step-by-step explanation:
The tangent of one is the reciprocal of the tangent of the other.
__
In a right triangle, ...
tan = opposite/adjacent
For the two complementary acute angles in such a triangle, opposite and adjacent are swapped. That is the tangent of one is the inverse of the tangent of the other. (That inverse is also known as the cotangent.)
tan(α) = cot(90°-α) = 1/tan(90°-α)
Thank you for the help!
Reflect each point from the line y = -3
J = (0,-2) which reflected from y = -3 is (0,-4)
K = (1,-5) which reflected from y = -3 is (1,-1)
L = (4,-1) which reflected from y = -3 is (4,-5)
1. Each year, the third Thursday in March is named Kangaroo Day. The dates of Kangaroo Day for the next few
years are shown below, with one error. Which date is wrong?
(A)17/3/2022
(B) 16/3/2023
(C) 14/3/2024
(D) 20/3/2025
(E) 19/3/2026
Answer:
the eero is on date in answer 'c' because the date of kangaroo is in an arrangement form
Answer:
14/3/2024 is on a Thursday, but it is the second Thursday, not the third.
Step-by-step explanation:
If the first Thursday falls on March 1, the soonest the third Thursday could occur is 7+7+1 = March 15.
what is k + 1 3 = 5 1/8
suzanna need a borad that is a least 3.5 meters long.Is the board long enogh
Answer:
sweet god yes it is unless she 12 feet tall then no
Step-by-step explanation:
Answer: No.
Step-by-step explanation: No, because 3.5 converted is 350 and you need 370. Might be to late but hopefully this can help someone else!
A line passing through (p, 1/2) and (-8, q) has a slope of 3/4.
Find two possible values for each of p and q , and write the corresponding equations of the lines in slope-intercept form.
Can someone help me with this question...?
The corresponding equation is 4q + 3p = 22.
What is the slope of a line ?
The ratio of the change in the y coordinate to the change in the x coordinate is known as a line's b in mathematics.
Y and X, respectively, stand for the net change in the y-coordinate and the net change in the x-coordinate. Locate two locations along the chosen line and find their coordinates.
Find the y-coordinate difference between these two places (rise). Find the difference between the x-coordinates of these two points (run). Subtract the difference in y-coordinates from the difference in x-coordinates (rise/run or slope).
The slope is defined as the relationship between the rise, or vertical change, between two points and the change, or horizontal change, between the same two points and can be represented as an equation.
Given that, coordinates are (p, 1/2) and (-8, q), slope is 3/4.
m = (y2 - y1)/(x2 - x1)
34 = (q - 1/2)/-8 - p
-24 - 3p = 4q - 2
4q + 3p = 22
The corresponding equation is 4q + 3p = 22.
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