Question 255231: Please help me this one question..I am lost...
Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, the Z score on the comparison distribution for the sample score, and your conclusion. Assume that all populations are normally distributed.
Study Population Sample Score p Tails of Test
µ s
A 5 1 7 .05 1 (high predicted)
B 5 1 7 .05 2
C 5 1 7 .01 1 (high predicted)
D 5 1 7 .01 2
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Based on the information given for each of the following studies, decide whether to reject the null hypothesis. For each, give the Z-score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected, the Z score on the comparison distribution for the sample score, and your conclusion. Assume that all populations are normally distributed.
Study Population Sample Score p Tails of Test
µ s
A 5 1 7 .05 1 (high predicted)
B 5 1 7 .05 2
C 5 1 7 .01 1 (high predicted)
D 5 1 7 .01 2
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Are you saying the following ?
For study B the mean is 5, sample std. is 1, sample mean is 7, level
of significance is 5%, the test is 2-tail
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If so, the critical values are: z = +/-1.96
If so, the test statistic is z=(7-5)/[1/(sqrt(5)] = 4.47
Then you reject Ho because the test statistic is in the rejection interval.
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Am I reading you correctly?
Cheers,
Stan H.
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