The following table gives the marks of a sample of students in Statistics. Marks No. of Students 40 to less than 50 6. 50 to less than 60 12 60 to less than 70 22 70 to less than 80 34 80 to less than 90 39 90 to less than 100 19

The following table gives the marks of a sample of students in Statistics. Marks No. of Students 40 to less than 50 6. 50 to less than 60 12 60 to less than 70 22 70 to less than 80 34 80 to less than 90 39 90 to less than 100 19

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

The following table gives the marks
of a sample of students in Statistics.
Marks
No. of Students
40 to less than 50
50 to less than 60
12
60 to less than 70
22
70 to less than 80
34
80 to less than 90
39
90 to less than 100
19
The mean is:
Select one:
71.75
74.25
75.98
76.27

If the standard deviation of a data
set is (4.7); the variance will be:
Select one:
22.09
2.16
2.42
5.2

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