1.The health of employees is measured periodically by weighing them. A random sample of 54 employees has a mean weight of 170 pounds with a standard deviation of 121.2 pounds. Test the claim that the mean weigh for all such employees is less than 200 pounds. significance level 0.05

Hypothesis

Ho:

Ha:

p-value

Conclusion

2.TWO MEANS

A researcher wishes to determine whether people with high blood pressure can reduce their blood pressure by following a particular diet. Use the sample data below to test the claim that those who followed the diet have a lower mean blood pressure than those who did not followed the diet.

Followed the diet:n1 = 85,1 = 189.1 s1 = 38.7

Did not follow the diet: n2 = 75,2 = 203.7 s2 = 39.2

Hypothesis Ho:

Ha:

p-value

Conclusion

b. Find a 95% Confidence IntervalConfidence Interval.