NZ Level 5
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Mean, median mode and range (find missing data)

Interactive practice questions

$5$5 numbers have a mean of $7$7. If $4$4 of the numbers are $10$10, $10$10, $8$8 and $7$7 and the last number is $x$x, solve for the value of $x$x.

Approx 2 minutes
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The mean of $4$4 scores is $21$21. If three of the scores are $17$17, $3$3 and $8$8, find the $4$4th score (call it $x$x).

Han wants to try out as a batsman for a cricket team. In his last three matches, he scored $61$61, $75$75 and $66$66 runs. In his last match before trying out, he wants to lift his mean to $70$70. If $x$x is the number of runs he needs to score to achieve this, find $x$x.

Consider the frequency distribution table :



Plan and conduct surveys and experiments using the statistical enquiry cycle:– determining appropriate variables and measures;– considering sources of variation;– gathering and cleaning data;– using multiple displays, and re-categorising data to find patterns, variations, relationships, and trends in multivariate data sets;– comparing sample distributions visually, using measures of centre, spread, and proportion;– presenting a report of findings

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