How Many Tissues Should a Package of Tissues Contain? Researchers $\bar { x }$

How many tissues should a package of tissues contain? Researchers have determined that a person uses an average of 62 tissues during a cold. Suppose a random sample of 100 people yielded the following data on the number of tissues used during a cold: $\bar { x }$ = 50, s = 16. Identify the null and alternative hypothesis for a test to determine if the mean number of tissues used during a cold is less than 62. A) $H _ { 0 } : \mu = 62$ vs. $H _ { a } : \mu < 62$
B) $H _ { 0 } : \mu = 62$ vs. $H _ { \mathrm { a } } : \mu > 62$
C) $H _ { 0 } : \mu = 62$ vs. $H _ { \mathrm { a } } : \mu \neq 62$
D) $H _ { 0 } : \mu > 62$ vs. $H _ { \mathrm { a } } : \mu \leq 62$