If standard deviation is 15 and alpah is 0.05 my z score is 1.67 is this sample mean sufficient to conclude that the treatment has a significant effect??? I do not know where to begin on this one............ here is the rest of the info but I don't think we need it??
population mean is 60
sample mean is 65
sample size n=25
population mean is 60
sample mean is 65
sample size n=25
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