Answer
Step-by-step explanation:
Answer
Answer step-by-step explanation
a fair coin is tossed three times. let x be the number of heads on the first toss and y be the total number of heads. create a table that describes the joint pmg
The joint probability mass function (PMF) for the random variables x and y can be represented in a table with rows and columns corresponding to the possible values of x and y, respectively.
In this case, x represents the number of heads on the first toss, and y represents the total number of heads over all three tosses. There are two possible outcomes for each coin toss: heads (H) or tails (T). Thus, there are 2^3 = 8 possible outcomes for three coin tosses, which can be listed as follows: HHH, HHT, HTH, THH, HTT, THT, TTH, TTT. For the first toss, there are two possible outcomes: H or T. Thus, x can take on the values x = 0 or x = 1, with probabilities P(x = 0) = 1/2 and P(x = 1) = 1/2.
For the total number of heads over all three tosses, there are four possible outcomes: 0, 1, 2, or 3 heads. The joint probabilities can be calculated by considering the possible outcomes for each value of x. For example, if x = 0 (i.e., the first toss is a tail), then y can only be 0 or 1, depending on the outcomes of the second and third tosses. The probabilities of these outcomes are P(x = 0, y = 0) = 1/8 and P(x = 0, y = 1) = 3/8. The joint probability mass function for x and y can be summarized in a table as follows:
y=0 y=1 y=2 y=3
x=0 1/8 3/8 3/8 1/8
x=1 1/8 3/8 3/8 1/8
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When comparing three or more populations means within a set of quantitative data that is categorized according to one factor/treatment, a one-way ANOVA is appropriate.a. It is also appropriate in this situation, however, to compare two means at a time using multiple independent two sample t-tests. True or False?b. True. It is appropriate to compare two means at a time with independent two sample t-tests but it might be time-consuming.c. False. It is not appropriate to compare two means at a time in the way described. This would inflate the overall Type I Error and is a 'Multiple Testing' problem. The one-way ANOVA controls for the Type I Error and should be used instead.
c. False. It is not appropriate to compare two means at a same time with the way described above. This would remove the overall Type I Error is a 'Multiple Testing' problem.
Why it is not appropriate to compare two means at a time in the way described?The one-way ANOVA controls for the Type I Error and should be used instead. When comparing multiple means, conducting multiple independent two-sample t-tests is not recommended because the probability of committing a Type I error increases with each additional test, leading to an inflated overall Type I error rate.
ANOVA is a better method for comparing means when there are more than two groups as it compares all means simultaneously and controls for Type I error.
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Hich statement about a quadrilateral is true? A rectangle is a trapezoid. All rhombuses have four right angles. A trapezoid is a rhombus. A square is a rhombus.
Answer:
A square is a rhombus.
Step-by-step explanation:
A square is a geometrical figure which has four sides that are congruent. A rhombus is also a geometrical figure in which the four sides are congruent. Hence, it is true that a square is a rhombus. The difference between the two is that all the angles of a square are a right angle, while in rhombus the opposite angles are congruent.
Convert 14 degrees Fahrenheit to Celsius.
5
(F-32)
9
Note: C =
a. -10° Celsius
b. 10° Celsius
C. 1000 Celsius
d. -1000 Celsius
Answer:
a. -10.
Step-by-step explanation:
The formula is 5/9 * (F-32).
So 14-32 = -18
5/9 * -18 = -10
(14°F − 32) × 5/9 = -10°C
---
hope it helps
category: 05 mathematics knowledge a teacher surveys the class to see how many hours of video games the students have played in the previous week. below are the results of the survey. hours played number of students 0 3 1 2 2 4 3 0 4 5 5 2 6 9 7 or more 2 what is the mode of the survey results?
The mode of the survey results is 6 hours, as this was the most commonly reported number of hours of video games played in the previous week.
The mode of the survey results is the most frequently occurring number of hours of video games played in the previous week. In this survey, the most commonly reported number of hours played was 6. This is because 9 students reported playing 6 hours of video games in the previous week, which is the highest number of students reporting any single amount of hours played. The other numbers of hours played were reported less often, with 2 students reporting 5 hours, 4 students reporting 2 hours, 2 students reporting 1 hour, and 3 students reporting 0 hours. Therefore, the mode of the survey results is 6 hours.
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What is the point-slope form of a line that has a slope of One-half and passes through point (–7, 2)?
Answer:
D. y - 2 = 1/2(x - (-7))
Step-by-step explanation:
Stay home and stay safe!
Answer:
D) y - 2 = 1/2(x - (-7))
Step-by-step explanation:
I just took the quiz on edge
1. How many quadrants are on the Premiere Pro Screen?
Answer:
four quadrants on the monitors: Left, Right, Top Middle and Bottom Middle.
Step-by-step explanation:
Brianna is keeping track of how much money she saves.
She has $60 saved and saves another $15 each week.
How long will it take Brianna to save enough to buy a pair
of $180 sneakers? Show or explain your thinking.
what is the minimum distance you can park from a driveway leading from a fire department?
The minimum distance you can park from a driveway leading from a fire department can vary depending on the local laws and regulations in your area.
However, it is important to keep in mind that fire departments need clear and unobstructed access to their driveways at all times, in case of an emergency.
In many areas, the law requires a minimum distance of 20 feet from the edge of a fire department driveway to the nearest parked vehicle. This distance allows fire trucks and emergency vehicles enough space to turn, enter, and exit the driveway without any obstruction or delay.
It is also important to note that blocking a fire department driveway can result in a hefty fine or even a vehicle being towed away. This is because obstructing the entrance and exit to a fire department can cause unnecessary delay, which can be dangerous or even fatal in emergency situations.
Overall, it is important to always be aware of your surroundings and the laws in your area when parking near a fire department or any other emergency service. By doing so, you can ensure the safety and accessibility of these essential services at all times.
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can anyone help me? In each pair of triangles, parts are congruent as marked. Which pair of triangles is congruent by ASA?
Answer:
figure c
Step-by-step explanation:
You want to know the diagram that would correspond to use of ASA to declare the triangles congruent.
ASAASA refers to "angle-side-angle." In order for this to apply, there must be two pairs of congruent angles. Only figure c has two angles marked in each triangle. The marked side is between those angles, as it needs to be.
A manager wants to test whether two normally distributed and independent populations have equal variances. the appropriate test statistic for this test is a:_____.
A manager wants to test whether two normally distributed and independent populations have equal variances. the appropriate test statistic for this test is a "F-statistics."
What is F-statistics?An F statistic is a value obtained after performing an ANOVA test or even a regression analysis to determine whether the means of two populations differ significantly.
Some key features regarding the F-statistics are-
It is comparable to a T statistic from the a T-Test; a T-test would then inform you when a single result is statistically significant, whereas a F test would then tell you if a set of variables is statistically significant.When determining whether your total results are significant, you must use the F statistic in conjunction with the p value. Why? A significant result does not imply that all of your variables have been significant. The statistic is simply comparing the cumulative influence of all the variables.To know more about the F-statistics, here
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Wilbur paid $7 for a sandwich. He now has $10. With how much money did he start?
seventeen dollarsStep-by-step explanation:
Answer: 17 i think
brainliest????
Step-by-step explanation:
marked price of an article is rs 1500 what is selling price with 10 %vat
Answer:
if no discount is allowed
MP = SP = 1500
sp with vat = sp = vat amount
vat amount = vat% of sp
= 10% 0f 1500
= 150
sp with vat = sp = vat amount
= 1500 + 150
= 1650
need help asappppppp
An irrational number is a real number that cannot be expressed as a ratio of integers. The decimal expansion of an irrational number is neither terminating nor recurring.
Let us check the options one at a time:
OPTION A: -√196
The lifetime of a product can be estimated using a normal distribution. What is the probability that the product will last between 16.536 and 8.054 years if the average lifetime has a mean of 14.242 years and a standard deviation of 3.978 years?
The to your question is that we can use the normal distribution to estimate the probability that the product will last between 16.536 and 8.054 years.
In this case, we want to calculate the probability for x = 16.536 and x = 8.054. The mean (μ) is 14.242 years, and the standard deviation (σ) is 3.978 years.
Using the formula, we can calculate the z-scores for both values:
For x = 16.536: z = (16.536 - 14.242) / 3.978
For x = 8.054: z = (8.054 - 14.242) / 3.978
Once we have the z-scores, we can look up the corresponding probabilities in the standard normal distribution table or use a calculator. Subtracting the probability for the lower z-score from the probability for the higher z-score will give us the probability that the product will last between 16.536 and 8.054 years.
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Consider the figure shown below. How long is AB?
(MULTIPLE CHOICE)
Answer:
AB = 6 (Option B)
Which one can it be?
Answer:
sas
Step-by-step explanation:
Answer:
These triangles cannot be proven congruent.
Step-by-step explanation:
The image shows us two triangles with two pairs of congruent sides and one non-included angle. This theorem would be SSA, however, this is not enough to show congruency because the unknown side could be in two different places on the different triangles. Therefore, with this amount of information these triangles cannot be proven congruent.
Solve the equation.
7h-5(3h-8)= -72
7h-15h+40=-72
40+72=15h-7h
112=8h
h=14
What challenges could the United States face as a new nation??
Answer:
biden being president
Step-by-step explanation:
Answer:
Like different countries conceived in against frontier upsets, the United States confronted the test of building a sound economy, protecting public freedom, and making a stable political framework which gave a real spot to resistance. In 1790, it was not in the least clear that the Union would long endure.
Among all the points on the graph of z=11-x^2-y^2 that lie above the plane x + 3y + 4z = 0: find the point farthest from the plane. What are the values of x, y, and z for the point? x= y= z=
The value of point farthest from the plane is {Mod-(x + 3y + 4(11 - x² - y²))} / √26 units and the values of x, y, and z for the point is 1/8, 3/8, and 347/32.
What is the distance from a point to a plane?
The length of the perpendicular that is dropped from a point to touch a plane is actually the smallest distance between them.
Distance between point and plane:
The distance from (x₀, y₀, z₀) to the plane Ax +By + Cz + D = 0 is
Distance = {Mod-(Ax₀ +By₀ + Cz₀ + D)} / √(A² + B² + C²)
As given,
Z = 11 - x² - y² and plane x + 3y + 4z = 0.
From formula:
D(x, y, z) = {Mod-(Ax₀ +By₀ + Cz₀ + D)} / √(A² + B² + C²)
Substitute values respectively,
D(x, y, z) = {Mod-(x + 3y + 4z)} / √(1² + 3² + 4²)
D(x, y, z) = {Mod-(x + 3y + 4z)} / √(1 + 9 + 16)
D(x, y, z) = {Mod-(x + 3y + 4z)} / √26
Substitute value of z,
D(x, y, z) = {Mod-(x + 3y + 4(11 - x² - y²))} / √26
For farthest point: Dₓ = 0;
1 - 8x = 0
8x = 1
x = 1/8
Similarly, for farthest point: Dy = 0;
3 - 8y = 0
8y = 3
y = 3/8
Substitute obtained values of x and y respectively,
z = 11 - x² - y²
z = 11 - (1/8)² - (3/8)²
z = 347/32
So, the farthest points are,
x = 1/8, y = 3/8, and z = 347/32.
Hence, the value of point farthest from the plane is Mod-(x + 3y + 4z)/√26 units and the values of x, y, and z for the point is 1/8, 3/8, and 347/32.
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Can someone please help me thank you
Answer:i think that the answer is 3
Step-by-step explanation:
Answer:
wouldn't it be 0 to 5 seconds it has the biggest change
Which statements about the arcs and angles are true? select three options. ∠efd ≅ ∠egd ∠egd ≅ ∠ecd arc e d is-congruent-to arc f d marc e f = 60° marc f d = 120°
The true statements about the arcs and angles in circle C are:
∠EFD ≅ ∠EGD.Arc ED ≅ arc FD.m arc FD = 120°.How to analyze the arcs and angles?In Geometry, the sum of the measures of the interior angles in a quadrilateral is equal to 360°. Thus, we have:
m∠G + m∠GDC + m∠DCE + m∠GEC = 360°
60 + 90 + m∠DCE + 90 = 360
240 + m∠DCE = 360
m∠DCE = 360 - 240
m∠DCE = 120°.
Since ∠DFE is an inscribed angle that is subtended by arc DE, we have:
m∠DFE = m∠DCE
m∠DFE = 120
m∠DFE = 1/2 × 120
m∠DFE = 60°.
Therefore, ∠EFD ≅ ∠EGD.
From circle C, we can deduce that side ED is subtended by arc ED and side FD is subtended by arc FD (side ED ≅ side FD). Thus, arc ED ≅ arc FD and m arc FD is equal to 120°.
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Answer:
A C E
took quiz
Consider the PDE au(x, t) = 4 d²u(x, t) 2 Ət əx² For each of BCs and ICs, solve the initial value problem. du(π,t) a) BCs: u(0,t)=0 = = 0 and əx IC: u(x,0) = x ANSWER: f(x)= n=1 u(2,t) = 0 and u(0,t)=0 u(x,0)=sin x ANSWER: f(x)=¹1_sin(2 + nx) na n=1 1+ 2 X b) BCs: IC: 8 (2n-1) T n+1 (-1)041 -4(2n-1)²t sin(2-nπ) nπ 1- 2 e sin (2n-1) 2 na sin X 2 -(nn)²t x -X
the solution for the initial value problem is: u(x, t) = sin(sqrt(-λ² * (a / 4)) * x) * exp(-λ² * t) where λ = ± sqrt(-4n² / a), and n is a non-zero integer.
The given partial differential equation is:
au(x, t) = 4 * (d²u(x, t) / dt²) / (dx²)
a) BCs (Boundary Conditions):
We have u(0, t) = 0 and u(π, t) = 0.
IC (Initial Condition):
We have u(x, 0) = x.
To solve this initial value problem, we need to find a function f(x) that satisfies the given boundary conditions and initial condition.
The solution for f(x) can be found using the method of separation of variables. Assuming u(x, t) = X(x) * T(t), we can rewrite the equation as:
X(x) * T'(t) = 4 * X''(x) * T(t) / a
Dividing both sides by X(x) * T(t) gives:
T'(t) / T(t) = 4 * X''(x) / (a * X(x))
Since the left side only depends on t and the right side only depends on x, both sides must be equal to a constant value, which we'll call -λ².
T'(t) / T(t) = -λ²
X''(x) / X(x) = -λ² * (a / 4)
Solving the first equation gives T(t) = C1 * exp(-λ² * t), where C1 is a constant.
Solving the second equation gives X(x) = C2 * sin(sqrt(-λ² * (a / 4)) * x) + C3 * cos(sqrt(-λ² * (a / 4)) * x), where C2 and C3 are constants.
Now, applying the boundary conditions:
1) u(0, t) = 0:
Plugging in x = 0 into the solution X(x) gives C3 * cos(0) = 0, which implies C3 = 0.
2) u(π, t) = 0:
Plugging in x = π into the solution X(x) gives C2 * sin(sqrt(-λ² * (a / 4)) * π) = 0. To satisfy this condition, we need the sine term to be zero, which means sqrt(-λ² * (a / 4)) * π = n * π, where n is an integer. Solving for λ, we get λ = ± sqrt(-4n² / a), where n is a non-zero integer.
Now, let's find the expression for u(x, t) using the initial condition:
u(x, 0) = X(x) * T(0) = x
Plugging in t = 0 and X(x) = C2 * sin(sqrt(-λ² * (a / 4)) * x) into the equation above, we get:
C2 * sin(sqrt(-λ² * (a / 4)) * x) * C1 = x
This implies C2 * C1 = 1, so we can choose C1 = 1 and C2 = 1.
Therefore, the solution for the initial value problem is:
u(x, t) = sin(sqrt(-λ² * (a / 4)) * x) * exp(-λ² * t)
where λ = ± sqrt(-4n² / a), and n is a non-zero integer.
Note: Please double-check the provided equation and ensure the values of a and the given boundary conditions are correctly represented in the equation.
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PLease somebody help me
Answer:
Yes they ae all proportional
Equation: x*0.35=y
Step-by-step explanation:
Find the unit rate for all and compare
1.05/3=0.35
1.75/5=0.35
2.8/8=0.35
Since they are all equal, there proportional
Answer:
y = 0.35x
Step-by-step explanation:
Jane:
Cost of 3 postcards= $1.05
Cost of 1 post card = 1.05 ÷ 3
= $ 0.35
Rosi:
Cost of 5 postcards= $1.75
Cost of 1 post card = 1.75 ÷ 5
= $ 0.35
Tanya:
Cost of 8 postcards= $2.80
Cost of 1 post card = 2.80 ÷ 8
= $ 0.35
As unit rate is same, Cost and number of postcards are in proportion.
Cost of cards = 0.35 * number of cards
y = 0.35*x
y = 0.35x
A video game player is in the shape of a rectangular prism. It has a length of 20 inches, a width of 11.4 inches, and a height of 3.5 inches. What is the volume of the video game player in cubic inches?
Answer:
798
Step-by-step explanation:
pls I need help please :D its math and you'll get 30 points
Its a picture
Answer:
5,750
Step-by-step explanation:
if he has 10 of each then you can multiply each bag by 10 and then multiply the amount of bags to the amount the coin is worth
Kaityln saves $35 in 50 days. Her sister saves $15 in 20 days. Determine who is
saving at a higher rate.
pls help will give points
Answer:
Its A
Step-by-step explanation:
Took it on edg 2020
whats 1+1?
I would also like an explanation on how you found the answer too thanks
Answer:
2
Step-by-step explanation:
1x = \(\frac{d}{dx} \frac{1}{2}x^2\)
\(\frac{d}{dx} \frac{1}{2}x^2\)+ \(\frac{d}{dx} \frac{1}{2}x^2\)= \(\frac{d}{dx} }x^2\)
\(\frac{d}{dx} }x^2\) = 2x
2x/x = 2
find the exact values of the sine, cosine, and tangent of the angle. 255° = 300° − 45°
The exact values of the sine, cosine, and tangent of the angle 255° are -1/√2, 1/√2, and -1, respectively.
To find the exact values of the sine, cosine, and tangent of the angle 255°, we can use the identity that relates the trigonometric functions of an angle to the trigonometric functions of its complement.
By expressing 255° as the sum of 300° and -45°, we can determine the exact values of the trigonometric functions for the given angle.
We know that the sine, cosine, and tangent of an angle are periodic functions, repeating every 360 degrees. To find the exact values of the trigonometric functions for 255°, we can express it as the sum of 300° and -45°, where 300° is a multiple of 360°.
Since the sine, cosine, and tangent functions are odd or even functions, we can use the values of the trigonometric functions for 45° to determine the values for -45°.
For 45°:
sin(45°) = cos(45°) = 1/√2
tan(45°) = 1
Since cosine is an even function, cos(-45°) = cos(45°) = 1/√2.
Since sine is an odd function, sin(-45°) = -sin(45°) = -1/√2.
Using the definition of tangent as the ratio of sine to cosine, tan(-45°) = sin(-45°) / cos(-45°) = (-1/√2) / (1/√2) = -1.
Therefore, for the angle 255°:
sin(255°) = -1/√2
cos(255°) = 1/√2
tan(255°) = -1
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