The following data represent the number of seconds it took 20 students to find information from the Internet on a personal computer. Class Frequency.  Class Frequency (f) 34 - 38 4 39 - 43 6 44 - 48 3 49 - 53 4 54 - 58 3 total 20 Find each of these. Show the complete solution. Mean              c. Variance Modal class    d. Standard deviation

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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The following data represent the number of seconds it took 20 students to find information from the Internet on a personal computer. Class Frequency. 

Class

Frequency (f)

34 - 38

4

39 - 43

6

44 - 48

3

49 - 53

4

54 - 58

3

total

20

Find each of these. Show the complete solution.

  1. Mean              c. Variance
  2. Modal class    d. Standard deviation
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