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Chapter 9: Q. 9 (page 537)

A random survey of 75death row inmates revealed that the mean length of time on death row is17.4years with a
standard deviation of6.3years. If you were conducting a hypothesis test to determine if the population mean time on death
row could likely be15years, what would the null and alternative hypotheses be?
a. H0: __________
b. Ha: __________

Short Answer

Expert verified

Null and alternative hypotheses be the p-value 0.0013.0.0013.

Step by step solution

01

Introduction


A normal distribution has a standard deviation of11. We want to verify a claim that the mean is greater than1212. So, the null hypothesis is

\begin{align*} H_0:\mu \leq 12, \end{align*}H0:μ≤12,

and the alternate hypothesis is

\begin{align*} H_a:\mu > 12. \end{align*}Ha:μ>12.

We know that the p-value is 0.0013.0.0013. Therefore, the graph for this problem is

02

:  Null and alternative hypotheses be 


The p-value is 0.0013.0.0013.

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