How Many Tissues Should a Package of Tissues Contain? Researchers $\bar { x } = 51 , s = 25$

How many tissues should a package of tissues contain? Researchers have determined that a person uses an average of 61 tissues during a cold. Suppose a random sample of 2500 people yielded the following data on the number of tissues used during a cold: $\bar { x } = 51 , s = 25$ . Suppose the corresponding test statistic falls in the rejection region at $\alpha = .05$ . What is the correct conclusion?

A) At $\alpha = .10$ , reject $H _ { \mathrm { a } }$ .
B) At $\alpha = .10$ , reject $H _ { 0 }$ .
C) At $\alpha = .05$ , accept $H _ { \mathrm { a } }$ .
D) At $\alpha = .05$ , reject $H _ { 0 }$ .