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 age 65−74 years: n = 113, x = 12.2, and s = 6.69. Does this data indicate that average daily zinc intake in the population of all males age 65−74 falls below the recommended allowance? (Use α = 0.05.)
State the appropriate null and alternative hypotheses.

H₀: μ = 15
H_a: μ ≤ 15H₀: μ = 15
H_a: μ > 15    H₀: μ = 15
H_a: μ < 15H₀: μ = 15
H_a: μ ≠ 15

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.)

z	=
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 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.Reject the null hypothesis. There is sufficient evidence that average daily zinc intake falls below 15 mg/day.

Answer 1

Hoid =15, Ha lais waliend 2) n=113, á = 12.2, S = 6.69 x -Uo 1 2 2- is =vius sim 6.65VTT3 Pralue = Piz 4-4.45) = 0 3 o eos thore is reject the null hykelheres subburient evdence inbakes fall below auereix zne 15