David is a statistician. he has a sample size of 40 (which he cannot change). what element of his hypothesis test can he adjust to minimize the probability that he incorrectly rejects the null hypothesis?
a.
the mean of the population
b.
the mean of the sample
c.
the standard deviation of the population
d.
the significance level of the test

the correct answer is:

d) the significance level of the test

explanation:

we cannot change the mean of the population, or the standard deviation of the population. we also cannot change the mean of the sample. the one thing we do have control over is the level of significance of the test.

step-by-step explanation:

(a) the volume of the cone is 20/3 in3

hence, option a is correct.