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.

the camry sales+accord sale=828,000. to make it so the two numbers are 18 thousand apart and still equal 828,000, you first need to find out what half of 828,000 is. 828,000/2=414,000. for the two numbers to equal 828,000, you have to add the same amount as you subtract from the middle. in this case, the number is 9,000 because it's half of 18,000. to equal 828,000, you have to add 9,000 to 414,000 for the camry and subtract 9,000 from 414,000 for the accord. 414,000+9,000=423,000.

414,000-9,000=405,000.

423,000+405,000=828,000.

423,000-405,000=18,

hope it