### Question 4#### Hypothesis Testing for Difference in Population MeansGiven the following information and a significance level \(\alpha = 0.20\), suppose the samples are selected independently and the populations are normally distributed. The hypotheses to test are:Null Hypothesis (\(H_0\)): \(\mu_1 - \mu_2 = 0\) Alternative Hypothesis (\(H_a\)): \(\mu_1 - \mu_2 \neq 0\)##### Sample Data- **Sample 1**: - Sample size (\(n_1\)) = 31 - Sample mean (\(\overline{x}_1\)) = 51.9 - Sample variance (\(\sigma_1^2\)) = 49- **Sample 2**: - Sample size (\(n_2\)) = 32 - Sample mean (\(\overline{x}_2\)) = 53.5 - Sample variance (\(\sigma_2^2\)) = 64##### Conclusion Options:a. Reject the null hypothesis b. Fail to reject the null hypothesis c. There is not enough information d. None of themTo determine the correct conclusion, one would typically calculate the test statistic (often using a t-test for independent means if population variances are unknown but assumed to be approximately equal or unequal based on sample data). Using the given significance level, we would then compare the test statistic to the critical value or use a p-value approach to make a decision regarding the null hypothesis.

Given Data : For Sample 1 x̄1 = 51.9 σ1 =√49 = 7 n1 = 31 For Sample 2…

Answered: What is your conclusion about the…

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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3. Which of the following are practical ways to assess equal variances of the residuals? Select all that apply a. Hartley's F-max test (provided data look normal and sample sizes are same); b. Bartlett's test (provided normality seems to hold; sample sizes do not have to be the same); c. Levene's test (normality and equal sample sizes aren't needed) d. Boxplots of residuals, or boxplots of standardized residuals, or boxplots of the original data. e. Boxplots of cats and dogs.
Use a y-test to test the claim o 35 H, o35 hir winga H, o>35 Identify the test statistic. 18.652 (Round to three decimal places as needed.) me Identify the critical value(s). nts (Round to three decimal places as needed. Use a comma to separate answers as needed.) t: C k Contents edia Library View an example Get more help - Clear all Check answer Help me solve this Plan ior SucceSE 72°F A a a 99+ P Type here to search 10/05/17 Delete PrtSc Insert F12 E11
. The term sample usually refers to a sample that ___ - Consists of people with chemical dependency problems - Uses the same group of individuals with a before/after measurement - Requires a dependent variable for hypothesis testing - Is randomly selected from two dependent populations
A) What is the mean difference score, MD? (Hint: fill in the difference column using TMS - minus - Sham) a. 4 b. 5 c. 20 d. 4.2 B) What is the sample variance, s2, for the difference scores? a. 7.2 b. -9 c. 8.5 d. 9
Violation of which assumption below for the two-factor ANVOA is not a cause for concern with large sample sizes? a. The populations from which the samples are selected must have equal variances. b. The populations from which the samples are selected must be normal. c. A violation of any assumption below would be a concern, even with large sample sizes. d. The observations within each sample must be independent.
Class 1 Final Sample Size: 30 Sample Variance: 80.55 Sample Mean: 44.2917 Class 2 Final Sample Size:30 Sample Variance: 55.29 Sample Mean: 36.4833 The assignment says to use the Z test for means and assume the hypothesized difference is 0. 1. Is there a significant difference in the means of the two finals at the .01 level of significance? 2. Why or why not?
8.What is the sample variance and the estimated standard error for a sample of n = 9 scores with SS = 72? a. s2= 9 and sM = 3 c. s²= 3 and sM = 3 b. s? = 9 and SM = 1 d. s2 = 3 and sM= 1 %3D
3.

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