Question

a.) The cost of Canada's health care system continues to escalate, increasing the tax burden for all citizens. A study fo 70 Canadians showed a sample mean health care expenditure of $5170. Assume the expenditure for a randomly selected Canadian is normally distributed, with a population standard deviation of $687. Calculate the margin of error for a 99% confidence interval estimate of the population mean health care expenditure.

b.) A clinic in rural Guatemala measures the blood calcium level of 64 healthy pregnant women at their first visit for prenatal care. They find the mean of the blood calcium level is 9.57 and the standard deviation is 0.4. If you test the mean calcium level in the population from which these women come differs from 9.5, what is the p-value for this test?

c.) To test if human left feet are shorter than right feet, a random sample of 20 individuals was selected and both feet were measured for each individual, giving a sample containing 20 left foot measurements and 20 right foot measurements. The sampling design is an example of? independent samples, convenience sampling, volunteer sampling, retrospective study, or paired data?

d.)  random sample of 25 individuals was recruited to a weight reduction study. The weights of the 25 individuals were recorded at the beginning of the study (baseline) and again at the end of the study (follow-up). As part of the calculation of a confidence interval for the true mean change in weight, a standard error must be obtained by first

Answer 1