Answer Happy

A researcher wishes to determine whether the blood pressure of vegetarians is, on average, lower than the blood pressure of nonvegetarians. Independent simple random samples of 85 vegetarians and 75 nonvegetarians yielded the following sample statistics for systolic blood pressure: Vegetactar Nonvegetada ni = 85 n2 = 75 x1 = 124.1 mmHg *2 = 138.7 mmHg $1 = 38.7 52 = 39.2 mmHg mmHg Use a significance level of 0.01 to test the claim that the mean systolic blood pressure of vegetarians is lower than the mean systolic blood pressure of nonvegetarians. Do not assume that the population standard deviations are equal. Conclusion: Ho H1 Test statistic: P-value: Reject or Fail to Reject:

A researcher wants to test the claim that convicted burglars spend an average of 18.7 months in jail. She takes a random sample of 11 such cases from court files and finds that sample mean is 21.5 months and s = 7.4 months. Test the claim that u = 18.7 months at the 0.05 significance level. Ho: Conclusion: HO Test statistic: P-value: Reject or Fail to Reject: