1)Test hypothesis? 2)Do we accept or Reject? H0: U1-U2=0 H1: U1-U2>0 X1: 501051 S1: 4000.64 X2:...

1)Test hypothesis?

2)Do we accept or Reject?

H0: U1-U2=0 H1: U1-U2>0

X1: 501051 S1: 4000.64

X2: 52299.17 S2: 4000.01

N1: 2495 N2:2498

Solutions

Expert Solution

◦•●◉✿Solutions✿◉●•◦

◦•●◉✿Please like✿◉●•◦?

orchestra answered 1 year ago

Next > < Previous

Related Solutions

Let B = {u1,u2} where u1 = 1 and u2 = 0 0 1 and...

Let B = {u1,u2} where u1 = 1 and u2 = 0 0 1 and B' ={ v1 v2] where v1= 2 v2= -3 1 4 be bases for R2 find 1.the transition matrix from B′ to B 2. the transition matrix from B to B′ 3.[z]B if z = (3, −5) 4.[z]B′ by using a transition matrix 5. [z]B′ directly, that is, do not use a transition matrix

Consider the following hypothesis test. H0: u 1 -u 2= 0 Ha: u1 -u 2≠ 0 The following...

Consider the following hypothesis test. H0: u 1 -u 2= 0 Ha: u1 -u 2≠ 0 The following results are from independent samples taken from two populations. Sample 1 Sample 2 n 1 = 35 n 2 = 40 x 1 = 13.6 x 2 = 10.1 s 1 = 5.8 s 2 = 8.1 a. What is the value of the test statistic (to 2 decimals)? b. What is the degrees of freedom for the t distribution? (Round down your answer...

The bull and alternate hypothesis are: Ho:u1<u2 H1:u1>u2 A random sample of 20 items from the...

The bull and alternate hypothesis are: Ho:u1<u2 H1:u1>u2 A random sample of 20 items from the first population showed a mean of 100 and a standard deviation of 15. A sample of 16 items for the second population showed a mean of 94 and a standard deviation of 8. use the 0.5 significant level.

Let X1 and X2 have the joint pdf f(x1,x2) = 2 0<x1<x2<1; 0. elsewhere (a) Find the...

Let X1 and X2 have the joint pdf f(x1,x2) = 2 0<x1<x2<1; 0. elsewhere (a) Find the conditional densities (pdf) of X1|X2 = x2 and X2|X1 = x1. (b) Find the conditional expectation and variance of X1|X2 = x2 and X2|X1 = x1. (c) Compare the probabilities P(0 < X1 < 1/2|X2 = 3/4) and P(0 < X1 < 1/2). (d) Suppose that Y = E(X2|X1). Verify that E(Y ) = E(X2), and that var(Y ) ≤ var(X2).

(1) A researcher wants to test H0: x1 = x2 versus the two-sided alternative Ha: x1...

(1) A researcher wants to test H0: x1 = x2 versus the two-sided alternative Ha: x1 ≠ x2. (a) This alternative hypothesis indicates a one-sided hypothesis instead of a two-sided hypothesis. (b) The alternative hypothesis Ha should indicate that x1 ≥ x2 . (c)The null hypothesis (but not the alternative hypothesis) should involve μ1 and μ2 (population means) rather than x1 and x2 (sample means). (d) Hypotheses should involve μ1 and μ2 (population means) rather than x1 and x2 (sample...

Suppose we wish to test the hypothesis H0 :μ=45vs. H1 :μ>45. What will be the result...

Suppose we wish to test the hypothesis H0 :μ=45vs. H1 :μ>45. What will be the result if we conclude that the mean is 45 when the actual mean is 50? Choose one of the following. 1. We have made a Type I error. 2. We have made a Type II error. 3. We have made the correct decision.

Suppose a test is performed to test H0: risk difference = 0 versus H1: risk difference ≠ 0, and the test rejects H0 at α = 0.05.

Part 1. Suppose a test is performed to test H0: risk difference = 0 versus H1: risk difference ≠ 0, and the test rejects H0 at α = 0.05. Then, we can conclude that there is real significant evidence (α = 0.05) of a difference in proportions, _____________________ evidence that the risk difference is not 0, and _____________________ evidence that the relative risk and odds ratio are not _________________. Choose between significant, not significant, 0, 1. Part 2. Contrast...

Given the vectors u1 = (2, −1, 3) and u2 = (1, 2, 2) find a...

Given the vectors u1 = (2, −1, 3) and u2 = (1, 2, 2) find a third vector u3 in R3 such that (a) {u1, u2, u3} spans R3 (b) {u1, u2, u3} does not span R3

Suppose that we are to conduct the following hypothesis test: H0:μ =1030 H1:μ>1030 Suppose that you...

Suppose that we are to conduct the following hypothesis test: H0:μ =1030 H1:μ>1030 Suppose that you also know that σ=170, n=90, x¯=1058.9, and take α=0.01. Draw the sampling distribution, and use it to determine each of the following: A. The value of the standardized test statistic: Note: For the next part, your answer should use interval notation. An answer of the form (−∞,a)(−∞,a) is expressed (-infty, a), an answer of the form (b,∞)(b,∞) is expressed (b, infty), and an answer...

To test H0: ρ = 0 H1: ρ ≠ 0 a random sample of 22 observations...

To test H0: ρ = 0 H1: ρ ≠ 0 a random sample of 22 observations yielded r = 0.23. What is your decision at a 0.05 significance level? a. cannot reject H0 so we cannot say that there is a correlation. b. reject H0 so we cannot say that there is no correlation. c. reject H0 so there is correlation. d. reject H0 so we cannot say that there is correlation e. cannot reject H0 so there is no...

Subjects