The level of calcium in the blood of healthy young adults varies with a population mean of about 9.5 milligrams per deciliter. A clinic in rural Guatemala measures the blood calcium level of 180 healthy pregnant women at their first visit for prenatal care. The sample mean is 9.54 and sample standard deviation is 0.4. Is this an indication that the mean calcium level in the population from which these women come is greater than 9.5?

A. What is the p-value

B. What is your conclusion when testing at level .05

C. Would you expect a 99% confidence interval for the mean to be wider or narrower than the 90% interval

D. A similar study conducted in rural Panama found a 99% confidence interval for the mean calcium level as (9.45,9.97). Based on that, would you reject the hypothesis that the true mean calcium content in the associated population equals 9.5, when testing at level .01? YES/NO