Question

The recommended daily dietary allowance for zinc among males older than age 50 years is 15 mg/day. An article reports the following summary data on intake for a sample of males ago (Use a = 0.05.) 65-74 years: - 115, * = 12.9, and s = 6,83. Does this data indicate that average daily zinc intake in the population of all males age 65-74 falls below the recommended allowance? State the appropriate null and alternative hypotheses O HOR-15 Mais 15 How = 15 HA 15 OHON-15 ME > 15 How = 15 HH15 Calculate the test statistic and determine the p-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) P-value - State the conclusion in the problem context. Do not reject the null hypothesis. There is sufficient evidence that average daily zinc intake falls below 15 mg/day. Reject the null hypothesis. There is sufficient evidence that average daily zinc intake falls below 15 mg/day. Reject the null hypothesis. There is not sufficient evidence that average daily zinc intake falls below 15 mg/day. Do not reject the null hypothesis. There is not sufficient evidence that average daily zinc intake falls below 15 mg/day.

Answer 1

n=115 = 12.4 d = 0.05 S: 6.83 The hull and alternative hypothesis are: option (D) Hailu < 15 (Left failed test) Họ: A = 15 -3.30 Test statistic :- ta X-M = 12.9-15 si su 6.83/STIS = n-1 = 115-1=114) P-value= P(t<ttest) = P(+2-3-30) (using t table) = P-value = O· 000 6 (P-value <2) option B Reject the nude hypothesis. These is sufficient evidence that a redage daily Zinc intake falls below 15 mg/day.