Suppose the joint PMF of X and Y is P(X= x, Y = y) = axy ifx, y = {1,5}, 0 Otherwise. 1. Find the value of a. 2. Find the value of the covariance Cov(X, Y). (a, Cov(X, Y)) = 1/36,0

Q: Given M1 = −5, s1 = 4.6, n1 = 72, M2 = − 1, s2 = 3.3, and n2 = 60, calculate t.

A:

Q: Write answers to the following math problems: 41.109/0.405 - 93.55 =  10,530 / 4.30x104 x 19.33 =

A:

Q: 2. Twenty-five high school students complete a preparation program for taking the SAT test. Here are…

A: Given data,…

Q: How are your grades? In a recent semester at a local university, 500 students enrolled in both…

A: GivenTotal no. of students both Statistics I and Psychology I=500No. of students got A in statistics…

Q: If X = 17.34, s = 5.45, and M = 24.88, what is z?

A: Given: X = 17.34 s = 5.45 M = 24.88

Q: How did you get p value from hats given?

A: Solution-: We have test statistic=t_{stat}=-2.115 and df=87 We want to find the how to get p-value=?…

Q: Suppose that P(E)=0.76, P(F)= 0.45, and P(E and F) = 0.32. What is P(E or F)? P(E or F) (Simplify…

A:

Q: Evaluate the formula n=(z)2•p•(1−p)E2 when z=1.774​, p=0.56​, and E=0.02

A: Given, z = 1.774 p = 0.56 E = 0.02

Q: Evaluate p = 12 || x₁ + x2 n₁ + n₂ for x₁ = 2, X₂ = 15, n₁ = 53, and n₂ = 34. (Round to four decimal…

A:

Q: i dont understand how you got the 0.58

A: The mean is 8 and the variance is 16.

Q: How was the S1 found on answer A?

A:

Q: why is the P(D) not = 0.03 (3/100 cars)

A: Let D be the event that a car is defective, and C be the event that a defective car is checked. We…

Q: Given P(A and B) = 0.14, P(B) = 0.67, P(B|A) = 0.70, what is P(A)? Answer in decimal form. Round…

A:

Q: P(R4),n>4 5 = 1. Solve forn in the equation: - Pín

A:

Q: What is the accuracy of 0.8

A: givenaccuracy is 0.8we find in percentage

Q: Q3: answer about the following questions brainly. A: ſe2Lnx dx

A: Since,it is known form the property of natural logarithm eln(x)=x,So,it is concluded that…

Q: Shouldn't it be n=39?

A: here College students were divided at random into three groups of 39 each

Q: supposed to find the geometric mean of 14 and 6. I got 9.165..., but my teacher said it should be…

A: The given question is taken from the sequence and series in which we have to find the geometric mean…

Q: If P(A)=.62, P(B) = .47, and P(AUB)=.88; then P(AB)= .1.970 b. 210 670 8291 B

A:

Q: Given n (A^B) =17, n(A) =45, n(B) =143, calculate n (AUB) = ? and enter your answer in the box…

A: We have to calculate .

Q: where did  you get 0.5 from

A: The mean of the distribution, The standard deviation of the distribution,

Q: Find the value of zg. Z0.09 Z0.09 (Round to two decimal places as needed.)

A: Solution: From the given information, α=0.09.

Q: Consider the situation in which we ask 41 students to select their preference between studying alone…

A: The expected values are, Studying preferences Observed Proportion Expected Alone 17 12…

Q: Round your answer to the nearest tenth. 9.2 16.5

A:

Q: (21)8=... Select one: (10010)2 a. b. (1001)2 (10001)2 C.

A: Here convert the number (21)8, into base 2 number.

Q: where did you get  0.0649 from? on the problem

A: To find the 90% confidence interval for the difference in proportions between responses generated by…

Q: Find  P(A or B) for the following.  P(A)=0.20,P(B)=0.40, and  P(A and B)=0.02 P(A⁢ or B)= Enter…

A:

Q: When i run the calculation to find the test statistic value (t), I do not get the same t-value…

A: Concept: one sample t test is used

Q: 23/2

A: Given232

Q: What is the answer given that P(−1.5465 > z > 1.1143)?

A: P(−1.5465 > z > 1.1143)=? P(a>z>b)=P(z>b)+P(z<a)

Q: Where does the 0.025 come from?

A: The given confidence level is 95%.

Q: What is the value of (0.1)3 (20)3 ?

A: We have to find the value of: (0.1)3 (20)3

Q: Given_n(A^B) =23___,_n (A) =46, n(B)=51, calculate n(AUB)=?_and enter your answer in the box…

A:

Q: Simplify -214 144³

A:

Q: So what is the answer rounded to three decimal place

A: The hypothesized mean is 2.85.

Q: valuate the formula E=t*sn​, where t*=2.626​, s=0.73​, and n=103

A: The formula given is  E=t*sn​

Q: y=VX-2 gile Ramg

A: Write down y=f(x) and then solve the equation for x, giving something of the form x=g(y). Find the…

Q: I cant really tell what the answer to b and C are? is it (-0.8333) and z=1.751

A: The mean and the standard deviation are12.1 and 0.12, respectively.

Q: The answer you came up with is the same answer I came up with, but I got it wrong. The correct…

A: p-value = 0.976442045 earlier calculated using TI-84 calculator.

Q: Given, P(A) = 0.40, P( A and B) = 0.10 and P(A|B) = 0.30 Find P(B)? Round to 2 decimals

A: Answer: From the given data, P(A) = 0.40 P(A and B) = 0.10 P(A|B) = 0.30

Q: why did we put x = 1? the final answer i got is 49/e, please double-check

A: After double checking the detailed solution is given below

Q: If n=10 and p=0.7, find P(x=8)

A:

Q: Evaluate the formula n=(z)2•p•(1−p)E2 when z=1.668​, p=0.42​, and E=0.05

A: Given: z=1.668​ p=0.42​ E=0.05   The sample size n is obtained below:…

Q: How do we calculate p?

A: Introduction: P-value: The P-value is the probability of obtaining a test statistic value as extreme…