Question: or a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A 1)survey was done on students, and the

or a 4-units class like Statistics, students should spend average of 12 hours studying for the class. A 1)survey was done on students, and the distribution of total study hours per week is bell-shaped with a mean of 13 hours and a standard deviation of 3 hours. Use the Empirical Rule to answer the following questions. a) 95% of the students have study hours that are between Incorrect and c) What percentage of the students have study hours that are below 22? %

2)For the sample data shown, answer the questions. Round to 2 decimal places.

x
1
4.4
11.1
13.8
20.9

Find the mean: Correct Find the median: Correct Find the sample standard deviation:

Calculate the mean and sample standard deviation of the data shown. Round to two decimal places.

x
7.1
10.5
14.4
14.9
18.1
27.6

mean: Correct

Sample standard deviation:

x
2.7
29.3
29.8
7.7
25.9
20.6
15.5
2.5

Find the mean: Correct Find the median: Incorrect Find the sample standard deviation:

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