In: Math
The mean potassium content of a popular sports drink is listed as 146 mg in a 32-oz bottle. Analysis of 28 bottles indicates a sample mean of 145.5 mg. |
(a) | State the hypotheses for a two-tailed test of the claimed potassium content. |
a. | H0: μ = 146 mg vs. H1: μ ≠ 146 mg |
b. | H0: μ ≤ 146 mg vs. H1: μ > 146 mg |
c. | H0: μ ≥ 146 mg vs. H1: μ < 146 mg |
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(b) |
Assuming a known standard deviation of 1.9 mg, calculate the z test statistic to test the manufacturer’s claim. (Round your answer to 2 decimal places. A negative value should be indicated by a minus sign.) |
Test statistic |
(c) |
At the 5 percent level of significance (α = 0.05) does the sample contradict the manufacturer’s claim? |
Decision Rule: Reject H0 (Click to select)if z > + 1.96 or if z < -1.96if z < + 1.96 or if z < -1.96if z < + 1.96 or if z > -1.96 | |
The sample (Click to select)does not contradictcontradicts the manufacturer's claim. |
(d) |
Find the p-value. (Round intermediate calculations to 2 decimal places. Round your answer to 4 decimal places.) |
p-value |