Question: Increasing statistical power of a study would increase the probability of rejecting the null hypothesis when it is actually false increase the probability of rejecting

Increasing statistical power of a study would

increase the probability of rejecting the null hypothesis when it is actually false

increase the probability of rejecting the null hypothesis when it is actually true

increase the probability of rejecting the alternative hypothesis when it is actually true

increase the probability of rejecting the alternative hypothesis when it is actually false

100 students is normally distributed with mean of 40 minutes SD of 8 minutes. what is the percentage of the population of all exam takers that would spend between 40 to 56 minutes on the exam.

34%

48%

50%

68%

The Z statistic -2.mean of 50and the standard error is7.whats the mean of the sample

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