Question

A manufacturer claims that the mean lifetime of its lithium batteries is less than 1120 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 1100 hours with a

standard deviation of 75 hours. Test the manufacturer's claim. Use α = 0.01.

A. P-value = 0.110 > 0.01; do not reject H0; There is not enough evidence support the claim, that mean is less than 1120.

B. P-value = 0.097 > 0.01; do not reject H0; There is not enough evidence support the claim, that mean is less than 1120.

C. P-value = 0.097 < 0.05; reject H0; There is enough evidence support the claim, that mean is less than 1120.

D. P-value = 0.112 > 0.05; do not reject H0; There is not enough evidence support the claim, that mean is less than 1120.

Answer 1