A study is conducted to determine the effectiveness of mental exercises on short-term memory. Arandomized comparative experiment is conducted and the number of items recalled on a short-termmemory test is recorded for 25 individuals who practiced mental exercises and 35 individuals who didnot. The individuals who practiced mental exercises recalled 16.0 items on average with a variance of6.25. The individuals that did not do any mental exercises recalled 12.5 items on average with avariance of 7.29. Assuming the population of items recalled is Normal for each group, what is thestandard deviation of the sampling distribution of the difference in mean items recalled for the twogroups?(A)(B)(C)(D)(E)√6.25 +7.2916.25 7.29+V 25 35√6.25-7.2916.25 7.2925 356.25 7.29+60 60

Given, Group 1 (mental exercises): Sample size (n1) = 25 Variance (σ12) = 6.25 Group 2 (no mental…

Answered: A study is conducted to determine 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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