Interpreting Confidence Intervals

Interpreting Confidence Intervals

12th Grade

14 Qs

quiz-placeholder

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Interpreting Confidence Intervals

Interpreting Confidence Intervals

Assessment

Quiz

Mathematics

12th Grade

Hard

Created by

Katrina Boggus

Used 12+ times

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14 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

1. A 95% confidence level means...

A. There is a 95% probability that the true population parameter falls within the interval.

B. There is a 5% probability that the true population parameter falls within the interval.

C. If we were to repeat the sampling process many times, 95% of the intervals constructed would contain the true population parameter.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

2. A confidence level is:

A. The probability that the true population parameter falls within the interval.

B. The probability that the sample mean falls within the interval.

C. The level of confidence we have that the interval contains the true population parameter.

D. The margin of error for the estimate.

3.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

3. If a 90% confidence interval for the population mean is (10, 20), which of the following statements is true?

There is a 90% probability that the true population mean falls within the interval.

The mean of the sample is 15

If we were to repeat the sampling process many times, 90% of the intervals constructed would contain the true population mean.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

4. A researcher constructs a 99% confidence interval for a population proportion and obtains an interval of (0.45, 0.55). Which of the following statements is true?

A. There is a 99% probability that the true population proportion falls within the interval.

B. The sample proportion is 0.50.

C. If we were to repeat the sampling process many times, 99% of the intervals constructed would contain the true population proportion.

D. Both B and C.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

5. Increasing the sample size will:

A. Increase the width of the confidence interval.

B. Decrease the width of the confidence interval.

C. Have no effect on the width of the confidence interval.

D. Increase the level of confidence.

6.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

True or False: The more confident you want to be, the smaller your confidence interval will be.

True

False

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Which of the following changes to a study would result in a smaller confidence interval?

increasing the confidence level, increasing the sample size

increasing the confidence level, decreasing the sample size

decreasing the confidence level, decreasing the sample size

decreasing the confidence level, increasing the sample size.

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