1.The following are data for 12 individuals daily sodium intake. Is there significant evidence that the population mean daily sodium intake differs from 7.2? Show allhypothesis testing steps. (You can use EXCEL to calculate the summary statistics)

Subject: 1 2 3 4 5 6 7 8 9 10 11 12

sodium intake: 6.6 7.2 6.7 7.4 7.1 6.8 7.2 7.3 7.5 6.9 6.7 6.2

2.Using the same data from problem 1, calculate a 95% confidence interval for themean daily sodium intake. Provide an interpretation of this interval estimate.

3.Based on the confidence interval in problem 2, is the mean daily sodium intakesignificantly different from 7.1 , if= 0.05? Explain your reasoning.