Dot Plot and Probability Problem
Dot Plot and Probability Problem
Secondary 2
The table shows the number of books read by \(20\) students in a class in a particular month.
\(0\) | \(3\) | \(1\) | \(3\) | \(5\) |
|---|---|---|---|---|
\(2\) | \(3\) | \(2\) | \(4\) | \(4\) |
\(0\) | \(1\) | \(2\) | \(2\) | \(9\) |
\(1\) | \(0\) | \(2\) | \(0\) | \(0\) |
- Represent the data on a dot diagram.
- Briefly describe the distribution of the data.
- A student is selected at random. The probability that the student reads at least \(x\) books is \(\frac{1}{5}\) . Find the values of \(x\).
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Answer:(a) Dot counts: \(0:5,\ 1:3,\ 2:5,\ 3:3,\ 4:2,\ 5:1,\ 9:1\) (b) Range \(0\) to \(9\), cluster from \(0\) to \(5\), outlier \(9\), modes \(0\) and \(2\) (c) \(x=4\) books
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