for each of the following studies, the samples were given anexperimenal treatmen

Question

for each of the following studies, the samples were given anexperimenal treatment and the researchers compared their results tothe general population. (assume all popukations are normallydistributed.) for each, carry out a Z test using the 5 stepsof hypothesis testing for a two-tailed test. (please showwork)
population sample size sample mean significance level
N

a 36 8 16 38 .05 b 36 6 16 38 .05 c 36 4 16 38 .05 d 36 4 16 38 .01 e 24 4 16 38 .01 for each of the following studies, the samples were given anexperimenal treatment and the researchers compared their results tothe general population. (assume all popukations are normallydistributed.) for each, carry out a Z test using the 5 stepsof hypothesis testing for a two-tailed test. (please showwork)
population sample size sample mean significance level
N

a 36 8 16 38 .05 b 36 6 16 38 .05 c 36 4 16 38 .05 d 36 4 16 38 .01 e 24 4 16 38 .01

Explanation / Answer

(a) Given =0.05, Z(0.025)=1.96 (check normal table) Z=(xbar-)/(/n) =(38-36)/(8/sqrt(16)) =1 Since Z=1

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