Answered: In a class of twenty-five 15-year old…

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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In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national average for girls at this age is reported as follows: µ = 63.80 inches with a standard deviation, s = 2.66 inches.

What is the effect size Cohen’s d and what does it tell us about the effect?

Compute the z-statistic.

An analysis was conducted to determine whether the average height of the 25 girls in the same class is different from the general population of 15-year old girls and the p-value was .024. If the researcher used a = .01 what is your decision and what do you conclude based on why the analysis was conducted?

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