A sample of n 5 4 individuals is selected from a population with m 5 80 and s 5 5, and a treatment is administered to the sample. If the treatment really does have an effect, then what would be the effect of increasing the sample size to n 5 25?

a. Increase the chances that the sample will produce an extreme z-score and increase the likelihood that you will conclude that a treatment effect exists

b. Increase the chances that the sample will produce an extreme z-score and increase the likelihood that you will conclude that a treatment effect does not exist

c. Increase the chances that the sample will produce a z-score near zero and increase the likelihood that you will conclude that a treatment effect exists.

d. Increase the chances that the sample will produce a z-score near zero and increase the likelihood that you will conclude that a treatment effect does not exist.