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 10,000 people yielded the following data on the number of tissues used during a cold: $\bar { x } = 56 , s = 25$. We want to test the alternative hypothesis $H _ { \mathrm { a } } : \mu 1.96$ or $z

Question

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 10,000 people yielded the following data on the number of tissues used during a cold: $\bar { x } = 56 , s = 25$. We want to test the alternative hypothesis $H _ { \mathrm { a } } : \mu < 62$. State the correct rejection region for $\alpha = .05$. A) Reject $H _ { 0 }$ if $z > 1.96$ or $z < - 1.96$. B) Reject $H _ { 0 }$ if $z < - 1.96$. C) Reject $H _ { 0 }$ if $z < - 1.645$. D) Reject $H _ { 0 }$ if $z > 1.645$.

Quizplus · Accepted Answer

For a left-tailed test with $\alpha = 0.05$, the critical value is $z = -1.645$. Thus, we reject $H_0$ if $z < -1.645$.

How Many Tissues Should a Package of Tissues Contain? Researchers xˉ=56,s=25\bar { x } = 56 , s = 25xˉ=56,s=25

How Many Tissues Should a Package of Tissues Contain? Researchers $\bar { x } = 56 , s = 25$