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. We are interested in determining if the accident proportions differ between the two age groups.
The pooled estimator of the population proportion is
A) .305.
B) .300.
C) .027.
D) .450.

Question

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.  ​ We are interested in determining if the accident proportions differ between the two age groups.
The pooled estimator of the population proportion is
A) .305. 
B) .300. 
C) .027. 
D) .450.

Quizplus · Accepted Answer

The pooled estimator of the population proportion is calculated by taking the total number of accidents across both age groups (43) and dividing by the total number of individuals sampled (140). This gives us a pooled estimator of .307. However, it appears that there is a typo in the answer choices and .307 has been rounded to .305. Therefore, the best choice is B, which is the closest option to the correct answer of .307.

An Insurance Company Selected Samples of Clients Under 18 Years