11:20 Section Two In a hospital the average time that a patient will wait to enter a clinic is normally distributed with a mean of 20 minutes. A random sample of 10 patients revealed the following...

Extracted text: 11:20 Section Two In a hospital the average time that a patient will wait to enter a clinic is normally distributed with a mean of 20 minutes. A random sample of 10 patients revealed the following waiting time: 21 19 18 18 20 22 23 25 17 20 Given the sample standard deviation S = 2.5 Assume that the researcher wants to test whether the mean time that a patient will wait is more than 20 minutes using a level of significance of 0.01. The value of t-critical is: * 4 points a. 2.330 O b. 2.764 c. 2.821 O d. 3.250