The following data provided are the average hours fifty-six grade 8 students spent doing their homework every school week last school year 2020-2021. The lowest number of hours recorded is 5 hours (every 5 school days), and the highest is 34 hours. The table’s class interval is 5, and the mean is 18.9   HOURS FREQUENCY 5-9 3 10-14 8 15-19 23 20-24 11 25-29 9 20-24 2   Find the range Find the variance and standard deviation   excel file or with steps how to do it in excel

MATLAB: An Introduction with Applications
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  1. The following data provided are the average hours fifty-six grade 8 students spent doing their homework every school week last school year 2020-2021. The lowest number of hours recorded is 5 hours (every 5 school days), and the highest is 34 hours. The table’s class interval is 5, and the mean is 18.9

 

HOURS

FREQUENCY

5-9

3

10-14

8

15-19

23

20-24

11

25-29

9

20-24

2

 

  1. Find the range
  2. Find the variance and standard deviation

 

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