Scouts’ Earnings in Job Week: Mean and Median Class
Scouts’ Earnings in Job Week: Mean and Median Class
Secondary 2
In the recent Job Week carried out by a group of \(30\) scouts, the amount of money collected are shown in the table below.
Amount collected (\(\$w\)) | \(0<w\le 20\) | \(20<w\le 40\) | \(40<w\le 60\) | \(60<w\le 80\) | \(80<w\le 100\) |
|---|---|---|---|---|---|
Number of scouts | \(5\) | \(12\) | \(4\) | \(6\) | \(3\) |
- Copy and complete the following table.
Amount collected (\(\$w\))
Mid-value, \(x\)
Frequency, \(f\)
\(fx\)
\(0<w\le 20\)
\(20<w\le 40\)
\(40<w\le 60\)
\(60<w\le 80\)
\(80<w\le 100\)
\(\sum f=\)
\(\sum fx=\)
- Estimate the mean amount of money collected by each of the \(30\) scouts.
- State the class interval which contains the median.
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Answer:(a) Mid-values \(10,30,50,70,90\), \(fx: 50,360,200,420,270\), \(\sum f=30\), \(\sum fx=1300\). (b) \(\$43.33\) (2 d.p.) (c) \(20<w\le 40\)
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