A statistics professor is in the process of investigating how many classes university students miss each semester. To help answer this question, she took a random sample of 100 university students and...

Classes
10
11
13
6
8
13
9
10
6
13
14
9
7
10
8
12
10
12
10
10
10
8
7
12
12
10
10
12
10
12
11
10
7
12
6
12
13
12
10
11
10
11
10
11
15
8
12
9
11
11
9
8
9
9
17
10
8
12
9
8
12
11
9
10
11
9
12
10
11
14
8
8
14
8
12
3
11
8
8
11
12
10
8
8
10
11
7
11
11
12
9
10
11
9
13
12
7
12
10
13

USE EXCEL with explanation please

Extracted text: A statistics professor is in the process of investigating how many classes university students miss each semester. To help answer this question, she took a random sample of 100 university students and asked each to report how many classes he or she had missed in the previous semester. Estimate the mean number of classes missed by all students at the university. Use a 99% confidence level and assume that the population standard deviation is known to be 2.2 classes.