Which combination of factors will increase the chances of rejecting the null hypothesis?

If the alpha level increases:

A sample of n = 16 scores is selected from a population with µ = 80 with σ = 20.  On average, how much error would be expected between the sample mean and the population mean?

Which of the following accurately describes a hypothesis test?

What proportion of a normal distribution is located in the tail beyond z = 2.14?

Which of the following will increase the power of a statistical test?

A sample of n = 16 scores is obtained from a population with µ = 50 and σ = 16.  If the sample mean is M = 54, then what is the z-score for the sample mean?

John drives to work each morning and the trip takes an average of 38 minutes.  The distribution of driving times is approximately normal with a standard deviation of 5 minutes.  For a randomly selected morning, what is the probability that John’s drive to work will take less than 35 minutes?

A treatment is administered to a sample of n = 9 individuals selected from a population with a mean of 80 and a standard deviation of 12.  After treatment, the effect size is measured by computing Cohen’s d, and a value of d = 0.50 is obtained.  Based on this information, what is the mean for the treated sample?

What is the standard error of the mean if the standard deviation is 2.6 and the number of individuals is 81?