Question

The Mathematics test done shows a result presented as follows: 11-20(8), 21-30(12), 31-40(15), 41-50(21), 51-60(20), 61-70(8), 71-80(16), which shows a range of test scores and it's frequency in brackets. Find the following,

1. Q1
2. Median
3. Q3
4. 7th Deciles
5. 62nd percentile.
6. Mean

Answer 1

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