1.Express the confidence interval17.5

%

3.4

%

17.5%3.4%

in interval form. answer in decimal format (do not enter as percents).

2.If n=590 and

p

p^

(p-hat) =0.1, find the margin of error at a 99% confidence level Give your answer to three decimals

3.In a recent poll, 480 people were asked if they liked dogs, and 33% said they did. Find the margin of error of this poll, at the 99% confidence level. Give your answer to three decimals

4.If n=120 and

p

p^

(p-hat) = 0.53, construct a 99% confidence interval. Give your answers to three decimals

5.135 students at a college were asked whether they had completed their required English 101 course, and 70 students said "yes". Construct the 99% confidence interval for the proportion of students at the college who have completed their required English 101 course.

Enter your answers as decimals (not percents) accurate to three decimal places.

The Confidence Interval is (,)

6.Out of 500 people sampled, 250 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places

7.Express the confidence interval173.4

47.2

173.447.2

in the form of a trilinear inequality.

<

<

<<

8.You measure 22 turtles' weights, and find they have a mean weight of 31 ounces. Assume the population standard deviation is 14.4 ounces. Based on this, what is the maximal margin of error associated with a 90% confidence interval for the true population mean turtle weight.

Give your answer as a decimal, to two places

ounces

9.If n=22,

x

x

(x-bar)=46, and s=2, find the margin of error at a 90% confidence level

Give your answer to two decimal places

10.In a survey, 23 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $47 and standard deviation of $6. Find the margin of error at a 98% confidence level. answer to two decimal places.