Grouped Data on Plant Heights
Grouped Data on Plant Heights
Secondary 2
The grouped frequency table below shows the height of \(15\) plants in an experiment.
Complete the table below.
Height (\(H\)cm) | Mid-value (\(x\)) | Frequency (\(f\)) | \(fx\) |
|---|---|---|---|
\(30<H\le 40\) | \(3\) | ||
\(40<H\le 50\) | \(1\) | ||
\(50<H\le 60\) | \(6\) | ||
\(60<H\le 70\) | \(3\) | ||
\(70<H\le 80\) | \(2\) |
Find the estimated mean height of the \(15\) plants.
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Answer:\(55\) cm
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