Confidence Intervals Statements

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the population of interest?

• All M&M candies

• Blue M&M candies

• 95%

• 18.95%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the characteristic of study?

• All M&M candies

• Whether candy is blue

• Whether candy is not blue

• 15.1%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the confidence level?

• 22.8%

• 95%

• 5%

• 15.1%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the lower bound value?

• 22.8%

• 95%

• 5%

• 15.1%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the upper bound value?

• 22.8%

• 95%

• 18.95%

• 15.1%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

What is the point estimate from the sample?

• 22.8%

• 95%

• 18.95%

• 15.1%

We are 95% confident that the true proportion of all M&M candies which are blue is between 15.1% and 22.8%.

If you repeated the study 100 times with 100 random samples under the same conditions, how many samples would contain the actual proportion of blue candies?

• 100

• 5

• 95

• 19

We are 90% confident that the true proportion of all students who buy lunch from the cafeteria at least once each week is between 37% + 4%.

What is the margin of error for the confidence interval?

• 4%

• 8%

• 33%

• 90%

We are 90% confident that the true proportion of all students who buy lunch from the cafeteria at least once each week is between 37% + 4%.

What is the population of interest?

• All students

• Students who buy lunch

• 90%

• The cafeteria

We are 90% confident that the true proportion of all students who buy lunch from the cafeteria at least once each week is between 37% + 4%.

What is the upper bound?

• 37%

• 4%

• 33%

• 41%