The following shows the IQ test score, $x$, of $30$ participants who took the test. $81$ \(97\

Question

The following shows the IQ test score, $x$, of $30$ participants who took the test. $81$ $97$ $112$ $87$ $120$ $79$ $101$ $92$ $102$ $110$ $98$ $108$ $77$ $99$ $100$ $86$ $125$ $100$ $114$ $91$ $101$ $98$ $85$ $92$ $110$ $82$ $99$ $89$ $129$ $105$ Using the class intervals $70\le x < 80$ , $80\le x < 90$ and so on, construct a frequency table for the data. Using the grid below, draw a histogram to illustrate the data.

Accepted Answer

(i) Frequencies $2,6,8,7,4,3$ for $70\le x<80,\ldots,120\le x<130$ (ii) Histogram bars over the same intervals with heights $2,6,8,7,4,3$

\(81\)	\(97\)	\(112\)	\(87\)	\(120\)	\(79\)	\(101\)	\(92\)	\(102\)	\(110\)
\(98\)	\(108\)	\(77\)	\(99\)	\(100\)	\(86\)	\(125\)	\(100\)	\(114\)	\(91\)
\(101\)	\(98\)	\(85\)	\(92\)	\(110\)	\(82\)	\(99\)	\(89\)	\(129\)	\(105\)

Frequency Table and Histogram of IQ Scores

Frequency Table and Histogram of IQ Scores

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