A random sample of 15 statistics tutorials was selected from the past 5 years, and the percentage of students absent from each one was recorded. The results are given below. Assume the percentages of students' absences are approximately normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to estimate the mean percentage of absences per tutorial over the past 5 years with 90% confidence. Round your answers to two decimal places and use increasing order. Number of Absences 10.8 12.5 9.0 17.2 16.5 12.2 10.9 12.0 13.4 11.7 7.9 10.1 13.2 10.4 15.8

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A random sample of 15 statistics tutorials was selected from the past 5 years, and the percentage of students absent from
each one was recorded. The results are given below. Assume the percentages of students' absences are approximately
normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to estimate the mean percentage of absences per tutorial
over the past 5 years with 90% confidence. Round your answers to two decimal places and use increasing order.
Number of Absences
10.8
12.5
9.0
17.2
16.5
12.2
10.9
12.0
13.4
11.7
7.9
10.1
13.2
10.4
15.8
Transcribed Image Text:A random sample of 15 statistics tutorials was selected from the past 5 years, and the percentage of students absent from each one was recorded. The results are given below. Assume the percentages of students' absences are approximately normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to estimate the mean percentage of absences per tutorial over the past 5 years with 90% confidence. Round your answers to two decimal places and use increasing order. Number of Absences 10.8 12.5 9.0 17.2 16.5 12.2 10.9 12.0 13.4 11.7 7.9 10.1 13.2 10.4 15.8
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