Question
Download Solution PDFCalculate the mean from the following table.
Scores |
Frequencies |
0-10 |
2 |
10-20 |
4 |
20-30 |
12 |
30-40 |
21 |
40-50 |
6 |
50-60 |
3 |
60-70 |
2 |
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven:
Scores |
Frequencies |
0-10 |
2 |
10-20 |
4 |
20-30 |
12 |
30-40 |
21 |
40-50 |
6 |
50-60 |
3 |
60-70 |
2 |
Formula used:
Mean =
where fi = frequency of particular value
xi = Mid value of the frequency class
Calculation:
Scores | Frequencies (fi) | xi | fixi |
0-10 | 2 | 5 | 10 |
10-20 | 4 | 15 | 60 |
20-30 | 12 | 25 | 300 |
30-40 | 21 | 35 | 735 |
40-50 | 6 | 45 | 270 |
50-60 | 3 | 55 | 165 |
60-70 | 2 | 65 | 130 |
Total (∑): | 50 | 245 | 1670 |
Mean =
∴ The mean of the given frequency distribution table is 33.4.
Last updated on Jun 11, 2025
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