AP Stats - Chapter 8 Confidence Interval Review

Question 1

How do you check Normal here

Accepted Answer

Make a dot plot

Question 2

Determine which distribution to use, if any.

Accepted Answer

t-distribution

Question 3

Check to see if the conditions are met in order to create a confidence interval.

Accepted Answer

Yes, because np̂ ≥ 10 and nq̂ ≥ 10

Question 4

Determine whether this is a means or a proportions problem.

Accepted Answer

Proportions

Question 5

What is this product

Accepted Answer

Eggo Waffles

Question 6

Find a 95% confidence interval for the mean.

Accepted Answer

(6510, 7138)

Question 7

How do you check Independent here

Accepted Answer

10(250)

Question 8

Solve this puzzle

Accepted Answer

Score

Question 9

As the confidence level increases, the confidence interval gets __________.

Accepted Answer

wider

Question 10

Is this a means or a proportions problem?

Accepted Answer

Means

Question 11

Which Distribution would you use?

Accepted Answer

t-distribution

Question 12

A confidence interval is the ____________ plus or minus the __________ .

Accepted Answer

Point Estimate, Margin of Error

Question 13

For a means questions, If n<30 how do you check normal?

Accepted Answer

no strong skew, make a box and whisker, no outliers

Question 14

As the sample size increases, the confidence interval gets __________.

Accepted Answer

narrower

Question 15

Solve this puzzle

Accepted Answer

Barrel

Question 16

Construct a 90% confidence interval for the true proportion.

Accepted Answer

(0.595, 0.645)

Questions 16