Question
A university interviews 10 freshman students and asks them how often they call home each week. The average is 2.7 times with a standard deviation
A university interviews 10 freshman students and asks them how often they call home each week. The average is 2.7 times with a standard deviation of 1.27.
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- Can you assume that the data is normally distributed? Why?
- Assuming that the data is normally distributed, find the 95% confidence Interval of the mean
- Assuming that the data is normally distributed, what percentage of the students in the sample call home more than 3.0 times per week?
- Assuming that the data is normally distributed, what percentage of the students in the sample falls between 2.5 and 3.0 calls per week?
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Elementary Statisitcs
Authors: Barry Monk
2nd edition
1259345297, 978-0077836351, 77836359, 978-1259295911, 1259295915, 978-1259292484, 1259292487, 978-1259345296
