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Subjects / LC Mathematics / Statistics and Probability

Measures of centre and spread

Calculate and interpret mean, median, mode, range, interquartile range and standard deviation.

5th Year6th Year HigherOrdinaryFoundation
15practice questions

Multiple choice: 5 · Numeric answer: 10

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Numeric answerPaper 2 – Statistics and Probability
The mean of five numbers is 16. Four of the numbers are 18, 11, 30 and 17. Find the fifth number.
Whole numbers, decimals (2.5) or fractions (3/4).
Hint 1

Mean × number of values = total.

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