Assuming that the population standard deviation is 60, how large a sample would be needed to provide a 95% confidence interval with a margin of error of 5?

Question 19 options:

959

554

24

390

The symbolp₀refers to which of the following?

Question 21 options:

the population proportion under the null hypothesis

the actual population proportion

the sample proportion under the null hypothesis

the observed sample proportion

You are testing the null hypothesis that the population mean is equal to 200.What is the rule for rejecting the null hypothesis?

Question 22 options:

p val >= a

p val <= a/2

p val >= a/2

p val <= a