As part of the national health and nutrition examination survey, hemoglobin levels were checked for a sample of 1139 men age 70 and over. The sample mean was 145.3 g/Li and the standard deviation was 12.87 g/Li.

a) Use these data to construct a 95% confidence interval for meu

b) Does the confidence interval from part (a) gives limits in which we expect 95% of the sample data to lie? why or why not

c) Does the confidence interval from part (a) gives limits in wich we expect 95% of the popultaion to lie? why or why not