Question 1

A pediatric nurse is researching weight gain in premature babies. Previous research has indicated that premature babies gain a mean of 150 grams per month (assume = 22.3) . The nurse is researching a new program that has the goal of increasing the mean weight gain in a month. The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight gain of 160 grams per month.

What is the value of the test statistic?

A. -0.45

B. 2.84

C. 0.45

D. -2.84

Question 2

A pediatric nurse is researching weight gain in premature babies. Previous research has indicated that premature babies gain a mean of 150 grams per month (assume = 22.3) . The nurse is researching a new program that has the goal of increasing the mean weight gain in a month. The nurse takes a random sample of 40 premature babies to participate in the program over the next month with a resulting sample mean weight gain of 160 grams per month.

What is the p-value?

A. 0.9977

B. 0.0023

C. 0.8254

D. 0.05