A Manufacturer of Cell Phone Batteries Claims That the Median

Multiple Choice

A manufacturer of cell phone batteries claims that the median life of a battery is more than 40 hours. Suppose a random sample of 75 batteries finds that 32 have a life of more than 40 hours. State the null hypothesis to test the claim. Assume that the population of all battery lives is not normally distributed.

A) H₀: M_d ≥ 40
B) H₀: M_d ≠ 40
C) H₀: M_d > 40
D) H₀: M_d ≤ 40