On a standard measure of hearing ability the mean is

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 192 had kids. Based on this, plot a $99\mathrm{\%}$ confidence interval for the proportion of adult residents who are parents in a given county.
Express your answer in the form of three inequalities. Give your answers in decimal fractions up to three places ${\displaystyle <p<}$ Express the same answer using a point estimate and a margin of error. Give your answers as decimals, to three places.
${\displaystyle p=\pm }$

A population of values has a normal distribution with ${\displaystyle \mu =133.5}$ and ${\displaystyle \sigma =5.2}$. You intend to draw a random sample of size ${\displaystyle n=230}$.
Find the probability that a single randomly selected value is between 133.6 and 134.1.
${\displaystyle P\left(133.6<X<134.1\right)=}$?
Write your answers as numbers accurate to 4 decimal places.

In a study of the accuracy of fast food​ drive-through orders, Restaurant A had

302

accurate orders and

69

that were not accurate.

a. Construct a

90​%

confidence interval estimate of the percentage of orders that are not accurate.

b. Compare the results from part​ (a) to this

90​%

confidence interval for the percentage of orders that are not accurate at Restaurant​ B:

0.164<p<0.238.

What do you​ conclude?