The Claim of the Manufacturer of Cell Phone Batteries Is $\ge$

Multiple Choice

The claim of the manufacturer of cell phone batteries is 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 $\ge$ 40
B) H₀: M_d $\neq$ 40
C) H₀: M_d > 40
D) H₀: M_d $\le$ 40