Given two dependent random samples with the following results:\[\begin{array}{|c|cccccccc|}\hline\text{Population 1} & 44 & 21 & 39 & 33 & 17 & 31 & 24 \\\text{Population 2} & 31 & 19 & 36 & 41 & 31 & 21 & 29 \\\hline\end{array}\]Use this data to find the 80% confidence interval for the true difference between the population means.Let $ d = \text{(Population 1 entry)} - \text{(Population 2 entry)} $. Assume that both populations are normally distributed.**Step 1 of 4**: Find the mean of the paired differences, $ \bar{d} $. Round your answer to one decimal place.**Answer**:

Population 1Population 24431211939363341173131212429

Answered: Given two dependent random samples with…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Given two independent random samples with the following results: ₁ = 16 n₁ = 8 ₁ = 98 ₁ = 70 s₁ = 15 5 = 19 Use this data to find the 90% confidence interval for the true difference between the population means. Assume that the population variances are equal and that the two populations are normally distributed. Step 3 of 3: Construct the 90% confidence interval. Round your answers to the nearest integer. Copy Data
Need sub part B answered only
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Justin wants to know whether a commonly prescribed drug does improve the attention span of students with attention deficit disorder (ADD). He knows that the mean attention span for students with ADD who are not taking the drug is 2.3 minutes long. His sample of 12 students taking the drug yielded a mean of 4.6 minutes. Justin can find no information regarding σx , so he calculated s2x =1.96. a. Identify the independent and dependent variables. b. In a sentence, state the null hypothesis being tested. c. Using symbols, state the null and alternative hypotheses. d. Determine the critical region using a one-tailed test with alpha = .05. e .Conduct the hypothesis test (Do the math and compare the t-critical and t-obtained values). f. State your conclusions in terms of H0 (Should you reject the H0 or fail to reject/accept the H0). g. Based on your analysis, is there a relationship between the drug and attention span?
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