Question

A manufacturer claims that the mean lifetime of its lithium batteries is less than 1520 hours. A homeowner selects 27 of these batteries and finds the mean lifetime to be 1498 hours with a standard deviation of 76 hours. Test the manufacturer's claim. Use α = 0.10.

A. P-value = 0.112 > 0.02; do not reject H0; There is not enough evidence support the claim, that mean is less than 1500.

B. P-value = 0.072 > 0.05; do not reject H0; There is not enough evidence support the claim, that mean is less than 1520.

C. P-value = 0.012 < 0.10; reject H0; There is enough evidence support the claim, that mean is less than 1500.

D. P-value = 0.072 < 0.10; reject H0; There is enough evidence support the claim, that mean is less than 1520.

Answer 1