for a one-tailed test the critical value:

A. Helps determine if the test statistic falls in the rejection region or not

B. Is the number if standard errors away from the sample mean

C. Fails to reject the null hypothesis if the test statistic exceeds the critical value

D. Divides the sampling distribution into three parts

Compute 95 percent intervals for the population proportion p when p-hat = .6 and n = 50

A. [45.769, 50.977]

B. [0.464, 0.736]

C. [1.222, 3.887]

D. [0.008, 9.999]

If margin of error decreases, then sample size

A. Stay same

B. Increases

C. Decreases

D. No effect on sample size

The probability that the confidence interval will not contain the population mean M is denited by_____.

A. T- alpha

B. Z - alpha

C. alpha

D. 1 - alpha

If the random variable z has a standard normal distribution. Find the probaility of P(Z= -2)

A. .0235

B. 0.00

C. .9772

D. .0228

E. .7994