Question

1. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.9 days and a standard deviation of 2.1 days.

What is the probability of spending more than 2 days in recovery? (Round your answer to four decimal places.)

2. The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.8 days and a standard deviation of 2.4 days.

What is the 90th percentile for recovery times? (Round your answer to two decimal places.)

3. The length of time it takes to find a parking space at 9 A.M. follows a normal distribution with a mean of 6 minutes and a standard deviation of 2 minutes.

Seventy percent of the time, it takes more than how many minutes to find a parking space? (Round your answer to two decimal places.)

4. About what percent of the x values from a normal distribution lie within two standard deviations (left and right) of the mean of that distribution? (Enter an exact number as an integer, fraction, or decimal.)

Answer 1