If the population mean is 60, the standard deviation is 20, and the sample size is 16, what value of the sample mean is required for a one-tailed test at the 0.05 level to be significant?
The mean must be 58.22 or higher.
58.22
.01
Set the simulation to use these parameters and examine the graph and find the upper cut off.
If the population mean is 60, the standard deviation is 20, and the sample size is 16, what is the power of a one-tailed test at the 0.05 level?
The power is .639
.639
.01
Set the simulation to use these parameters and examine the graph and find the probability of rejecting the null hypothesis.
Increasing sample size
The larger the sample size the greater the power.
true
increases power
false
decreases power
Use the simulation to change the sample size and observe the effect on power.
Increasing standard deviation
The larger the sample size the greater the power.
false
increases power
Use the simulation to calculate the power for various standard deviations holding everything else constant.
true
decreases power
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