III. Statistics students were asked to indicate their political orientation (republican or democrat)and then rated their degree of conservativeness (1 = not at all, 7= extremely). Assume that thefollowing two random samples of republicans' and democrats' conservativeness ratings comefrom normally distributed populations that have equal variances:Republicans: 4 5 4 3 4 6 5 75 3 5 7Democrats:2 3 4 1 4 3 3 1 3 1 4 4 3 3Do republicans and democrats differ in their level of conservativeness (use a = .01, two-tailed)?A. What are the null hypothesis and the alternative hypothesis?B. What are the critical value(s) (make sure to indicate what degrees of freedom wereused to determine this)?C. Use SPSS to calculate your test statistic.D. Explain why you would or would not reject the null hypothesis.E. Use SPSS to help you calculate Cohen's d and r2 (measures of effect size)F. Use SPSS to calculate a 99% CI for the mean difference in conservativeness betweendemocrats and republicans.MacBook Air吕口F3F4F5F7F8F9FIC

Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic.

A. What are the null hypothesis and the alternative hypothesis? B. What are the critical value(s) (make sure to indicate what degrees of freedom were used to determine this)? C. Use SPSS to calculate your test statistic.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

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Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

III. Statistics students were asked to indicate their political orientation (republican or democrat)
and then rated their degree of conservativeness (1 = not at all, 7= extremely). Assume that the
following two random samples of republicans' and democrats' conservativeness ratings come
from normally distributed populations that have equal variances:
Republicans: 4 5 4 3 4 6 5 75 3 5 7
Democrats:
2 3 4 1 4 3 3 1 3 1 4 4 3 3
Do republicans and democrats differ in their level of conservativeness (use a = .01, two-tailed)?
A. What are the null hypothesis and the alternative hypothesis?
B. What are the critical value(s) (make sure to indicate what degrees of freedom were
used to determine this)?
C. Use SPSS to calculate your test statistic.
D. Explain why you would or would not reject the null hypothesis.
E. Use SPSS to help you calculate Cohen's d and r2 (measures of effect size)
F. Use SPSS to calculate a 99% CI for the mean difference in conservativeness between
democrats and republicans.
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Looking at youth depression scores from a general sample of random children in the US, we want to determine if our sample is significantly different than the national average of scores of children with depression in the US. The national average of scores on a measure of depression is 5 points. We have no reason to assume it will be higher or lower than the US national average. The sample: 11 9 12 3 3 4 13 1. What is the null and alternative hypotheses? Do not specify any directionality. 2. What did you discover (using 95% Cl)? Provide an interpretation.