A repeated-measures study using a sample of n = 20 participants would produce a t statisticwith df =Question 13 options:9192039

Given data in the problem is n=20From that we have to calculate df

Answered: A repeated-measures study using a…

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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A graduate student is interested in how viewing different types of scenes affects working memory. For his study, he selects a random sample of 36 adults. The subjects complete a series of working memory tests before and after walking in an urban setting. Before the walk, the mean score on the test of working memory was 9.1. After the walk, the mean score was 1.4 higher. The graduate student has no presupposed assumptions about how viewing different types of scenes affects working memory, so he formulates the null and alternative hypotheses as: H00 : μDD = 0 H11 : μDD ≠ 0 Assume that the data satisfy all of the required assumptions for a repeated-measures t test. The graduate student calculates the following statistics for his hypothesis test: Mean difference (MDD) 1.4 Estimated population standard deviation of the differences (s) 1.6 Estimated standard error of the mean differences (sMDMD) 0.2667 Degrees of freedom (df) 35 The t statistic 5.25 The critical values of t…
Fewer young people are driving. In 1983, 87% of 19-year-olds had a driver's license. Twenty-five years later that percentage had dropped to 75% (University of Michigan Transportation Research Institute website, April 7, 2012). Suppose these results are based on a random sample of 1200 19-year-olds in 1983and again in 2008. a. At 95% confidence, what is the margin of error and the internal estimate of the number of 19-year old drivers in 19SS? b. At 95 6 confidence, what is the margin of error and the interval estimate of the number of 19-year old drivers in 2008? c.Is the margin of error the same in parts (a) and (b)? Why or why not?
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A repeated-measures study using a sample of n = 20 participants would produce a t statistic with df = Question 13 options: 9 19 20 39