Exhibit 11-8
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below.
$\begin{array}{ll}
\text { Under Age of 18}&\text { Over Age of 18}\
\mathrm{n}_{1}=500 & \mathrm{n}_{2}=600 \
\text { Number of accidents }=180 & \text { Number of accidents }=150
\end{array}$
We are interested in determining if the accident proportions differ between the two age groups.
-Refer to Exhibit 11-8 and let pu represent the proportion under and po the proportion over the age of 18. The null hypothesis is
A) pu - po ? 0.
B) pu - po ? 0 .
C) pu - po ? 0
D) pu - po = 0

Question

Exhibit 11-8
An insurance company selected samples of clients under 18 years of age and over 18 and recorded the number of accidents they had in the previous year. The results are shown below.
 $\begin{array}{ll}
\text { Under Age of 18}&\text { Over Age of 18}\
\mathrm{n}_{1}=500 & \mathrm{n}_{2}=600 \
\text { Number of accidents }=180 & \text { Number of accidents }=150
\end{array}$
 We are interested in determining if the accident proportions differ between the two age groups.
-Refer to Exhibit 11-8 and let pu represent the proportion under and po the proportion over the age of 18. The null hypothesis is
A) pu - po ? 0.
B) pu - po ? 0 .
C) pu - po ? 0
D) pu - po = 0

Quizplus · Accepted Answer

The null hypothesis for comparing two proportions is that the difference between them is zero, i.e., pu - po = 0.

Exhibit 11-8 an Insurance Company Selected Samples of Clients Under

Exhibit 11-8
an Insurance Company Selected Samples of Clients Under