34. The following table shows the cumulative frequency distribution of marks of 34 students
in a test:
Marks (out of 90)
Number of students
More that or equal to 80
More that or equal to 70
More that or equal to 60
More that or equal to 50
More that or equal to 40
More that or equal to 30
More that or equal to 20
More that or equal to 10
More that or equal to 0
Construct a frequency distribution table for the data above.
Also, find the mean of the data.
Answers
Answer:
May be this is helpfull for you
Step-by-step explanation:
Mean = 49.1
Step-by-step explanation:
Class Class Mean frequency Class mean * frequency
0 - 10 5 2 10
10 - 20 15 2 30
20 - 30 25 3 75
30 - 40 35 4 140
40 - 50 45 6 270
50 - 60 55 6 330
60 - 70 65 5 325
70 - 80 75 2 150
80 - 90 85 4 340
Total 34 1670
Mean = 1670/34
= 49.1
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