What are the approximate numbers of participants needed for each of the following planned studies to have 80% power, assuming equal numbers in the two groups and all using the 0.05 significance level? (Be sure to give the total number of participants needed, not just the number needed for each group.) Expected Means StudyM1M2Expected SPooledTails(a)106.0122.482.01(b)42.717.132.02(c)10.08.82.41(d)477.0502.050.02Approximate Number of Participants Needed in Each Group (Assuming Equal Sample Sizes) for 80% Power for the t Test for Independent Means, Testing Hypotheses at the 0.05 Significance Level Effect Size Small (0.20)Medium (0.50)Large (0.80)One-tailed3105020Two-tailed3936426

Given Expected mean in all study S pooled Find The approximate number of participants needed

Answered: What are the approximate numbers of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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What are the approximate numbers of participants needed for each of the following planned studies to have 80% power, assuming equal numbers in the two groups and all using the 0.05 significance level? (Be sure to give the total number of participants needed, not just the number needed for each group.)

Study	M1	M2	Expected SPooled	Tails
	Expected Means
(a)	106.0	122.4	82.0	1
(b)	42.7	17.1	32.0	2
(c)	10.0	8.8	2.4	1
(d)	477.0	502.0	50.0	2

Approximate Number of Participants Needed in Each Group (Assuming Equal Sample Sizes) for 80% Power for the t Test for Independent Means, Testing Hypotheses at the 0.05 Significance Level