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Chapter 8: Q 23. (page 509)

The researcher is deciding between a 95% confidence level and a 99% confidence level. Compared with a 95% confidence interval, a 99% confidence interval will be

a. narrower and would involve a larger risk of being incorrect.

b. wider and would involve a smaller risk of being incorrect.

c. narrower and would involve a smaller risk of being incorrect.

d. wider and would involve a larger risk of being incorrect.

e. wider and would have the same risk of being incorrect.

Short Answer

Expert verified

Option (b) is correct.

Step by step solution

01

Given Information

Confidence intervals are95%,99%

02

Explanation

Width of confidence interval and confidence level are related positively.

If confidence level is high, degree of precision is higher, risk of being incorrect is lower.

For 99%confidence level, interval is wider and risk of being incorrect is lower.

Option (b) is correct.

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