As part of the National Health and Nutrition Examination Survey (NHANES). hemoglobin levels were checked for a

Question:

As part of the National Health and Nutrition Examination Survey (NHANES). hemoglobin levels were checked for a sample of 1139 men age 70 and over.56 The sample mean was 145.3 g/1 and the standard deviation was 12.87 g/1.
(a) Use these data to construct a 95% confidence interval for LL.
(b) Does the confidence interval from part (a) give limits in which we expect 95% of the sample data to lie? Why or why not?
(c) Does the confidence interval from part (a) give limits in which we expect 95% of the population to lie? Why or why not?