A confidence interval for (μ1−μ2) is (-5, 8). Which of the following inferences is correct? Question 8 options: no significant difference between means μ1=μ2 μ1>μ2 μ1

For a population with mean of μ X = 30 and standard deviation of σ X = 4 , the z-score corresponding to X = 28 is:

highschool A and B reported the following summary of MCAT scores. Test claim that the applicants of freshmen in school A score higher than their counterparts of freshmen school B. (a) α = 10%, Classical approach, and conclude it (b) p-value to conclude it   school A : n=10, X bar=415, S2 = 100,  school B : n=7, X bar=410,S2 = 128 standard eRROR ESTIMATE= 15 P-value:  t-distribution, we find the p-value is = to 0.1811 for the one-tailed test. P-value 1811> signi. level a=0.05,  fail 2reject. .... not significant evidence to conclude that applicants of  School A scored higher than applicants of School B.

A telephone poll of 841 adult Americans was reported in an issue of Time Magazine. One of the questions asked was, "What is the main problem facing the country?" Forty percent answered, "crime." Construct a 88% confidence interval for the population proportion of Americans who feel that crime is the main problem.p'=α2=zα2=Margin of Error: E=We are 88% confident that the proportion of Americans who feel that crime is the main problem is between____ and ____.

The critical value for the T test for n=10, a=0.05, one tailed is?

please solve for a and b

Schools A and B reported the following summary of test scores. Test the claim that there is a difference in the means between two schools A and B. (a) At α = 5%, use the Classical approach to conclude it. (b) Using the P-value approach to conclude it. School A : n=80, X bar=37, S2=120 School B : n=60, X bar= 33, S2 = 90 Estimate of standard error= 138 P-value: Using t-distribution, we find the p-value is equal to 0.0224 for the two-tailed test. P-value 0.0224< significant level a/2=0.025, we reject, therefore, there is a difference in the means of the two schools A and B.

Identify the relevant the decision for the test, H0: μ = 2,500 vs. Ha: μ > 2,500 at α = 0.01 for an observed significance p = 0.018. Group of answer choices Since p ≤ α, the decision is not to reject H0. Since p > α, the decision is not to reject H0. Since p > α, the decision is to reject H0. Since p ≤ α, the decision is to reject H0. Since p > α/2, the decision is to reject H0.

please answer in text form and in proper format answer with must explanation , calculation for each part and steps clearly

Give a 99% confidence interval, for μ1−μ2 given the following information. n1=45, ¯x1=2.76, s1=0.73n2=35, x¯2=2.53, s2=0.62 Incorrect ± Incorrect Use Technology Rounded to 2 decimal places.