Question

ch 15 the proportion p of arizona drivers without insurance is a parameter describing the population of arizona drivers. to estimate p, we take a simple random sample (srs) of 200 arizona drivers and find that 35 do not have insurance. the sample proportion p^ (p - hat) of these subjects without insurance is: 0.180. 0.175. 0.225. 0.350.

Explanation:

Step1: Recall sample - proportion formula

The formula for the sample proportion $\hat{p}=\frac{x}{n}$, where $x$ is the number of successes (in this case, the number of drivers without insurance) and $n$ is the sample size.

Step2: Identify values of $x$ and $n$

Here, $x = 35$ (number of drivers without insurance) and $n=200$ (sample size of Arizona drivers).

Step3: Calculate the sample proportion

$\hat{p}=\frac{35}{200}=\frac{7}{40}=0.175$

Answer:

B. 0.175