A researcher investigated four different word lists for use in hearing assessments. She wantedto know whether the lists were equally difficult to understand in the presence of a noisybackground. To find out, she tested 96 subjects with normal hearing. She randomly assigned 24to each of the four word lists and measured the number of words perceived correctly in thepresence of background noise. Here are the summary statistics for number of words perceivedcorrectly for each of the four words lists.Sample sizeSample meanSample standarddeviationWord List A2432.55.1Word List B2434.07.1Word List C2425.756.3Word List D2426.256.7Suppose an F-test is to be performed. Which of the following is the correct null hypothesis? None of the explanatory variables help to predict the number of words perceived correctly.At least one of the explanatory variables helps to predict the number of words perceived correctly.All of the word lists have the same mean number of words perceived correctly.At least one of the word lists has a different mean number of words perceived correctly.All of the word lists have a different mean number of words perceived correctly.

Given that World list A World list B World list C World list D Sample size 24 24 24 24…

Answered: A researcher investigated four…

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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You are told that the proportion p-hat of those who answered "yes" to a poll about internet use is p-hat = 0.70, and the standard error of the proportion is 0.0458. What was the sample size?
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