We have a class of 10 students who all spent different amounts of time studying for...

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We have a class of 10 students who all spent different amountsof time studying for a quiz. The number of minutes each studentstudied is listed in the table below. Calculate the standarddeviation of the class study time. Remember this is a population,not a sample. Round your answer to the nearest whole minute.
Student
Minutes of Studying
Student 1
82
Student 2
110
Student 3
103
Student 4
106
Student 5
108
Student 6
80
Student 7
107
Student 8
77
Student 9
106
Student 10
121
1. The standard deviation of study time for the class is equalto minutes
Part 2:
The height of men in this class is normallydistributed with a mean of 71 inches and a standard deviation of 2inches.
A) A man who has a height of 60 inches is which of thefollowing: A. Shorter than average B. Taller than average C. Aboveaverage
B) Because the data are normally distributed we know thatapproximately % of the men in this class have heights between69 and 73 inches.
C) A man with a height of 75 inches is standard deviationsabove the mean.
D) The z-score for a man who is 78 inches is __

Answer & Explanation Solved by verified expert

3.9 Ratings (555 Votes)

Answer 1 Steps to calculate standard deviation First we need to find the mean Mean 82 11010 100 Now we need to subtract mean from each and every observation and then we need See Answer

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Student	Minutes of Studying
Student 1	82
Student 2	110
Student 3	103
Student 4	106
Student 5	108
Student 6	80
Student 7	107
Student 8	77
Student 9	106
Student 10	121