An animal shelter wants to estimate the mean number of animals housed daily and they know the standard deviation.If they want to find a 98 percent confidence interval the critical value to use is:
A)1.645
B)1.98
C)2.33
D)2.575

Question

Quizplus · Accepted Answer

To find a 98% confidence interval, we need to use the z-score corresponding to the 0.01 significance level (0.5% in each tail). According to the standard normal distribution table, this z-score is 2.33. Therefore, the critical value to use is 2.33 for a 98% confidence interval.

An Animal Shelter Wants to Estimate the Mean Number of Animals