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July 23, 2014

Homework Help: statistics

Posted by Ronnie on Tuesday, December 21, 2010 at 7:45am.

A sample of the number of study per week of college students is collected. Some of the sample results of the survey are given in the following table
Study Hr 4, 10, 20,24, 34, 36, 42
Z score -2.5,-1.75,-0.5,0, 1.25,1.5,2.25
P. Rank 10, 25, 35, 40, 50, 75 95

Q1- The mean study time for all the students
Q2- The median study time for all the student
Q3- The percent of college students who study between 20 and 36 hrs per week
Q4- The study time representing the 1st quartile
Q5- The Standard Deviation study time for all the students
Q5- The study time corresponding to a Z score of 1.75

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