Quiz: Point Estimates and Confidence Intervals

1. What is the best description of a point estimate?
a. any value from the sample used to estimate a parameter
b. a sample statistic used to estimate a parameter
c. the margin of error used to estimate a parameter
2. Which best describes the lower endpoint of a confidence interval?
a. point estimate
b. point estimate minus margin of error
c. point estimate plus margin of error
3. Which best describes the upper endpoint of a confidence interval?
a. point estimate
b. point estimate minus margin of error
c. point estimate plus margin of error
4. Which value will be at the center of a confidence interval?
a. population parameter
b. point estimate
c. margin of error
5. What is the relationship between a 95% confidence interval and a 99% confidence interval from the same sample?
a. the 95% interval will be wider
b. the 99% interval will be wider
c. both intervals have the same width

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