4.3 Measures of central tendency and dispersion

4.3 Measures of central tendency and dispersion Quiz

IB Maths: Analysis and Approaches SL: Quiz

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  1. 1. The mean of 6 numbers is 12. One number, 18, is removed. Find the mean of the remaining numbers.

    • A. 10.8
    • B. 11
    • C. 12
    • D. 9

  2. 2. Find the median of 5, 1, 8, 3, 9, 4.

    • A. 8
    • B. 3.5
    • C. 4.5
    • D. 5

  3. 3. A data set has standard deviation 6. Each value is multiplied by 2 and then 10 is added. Find the new standard deviation.

    • A. 22
    • B. 12
    • C. 16
    • D. 6

  4. 4. A data set has variance 16. What is its standard deviation?

    • A. 256
    • B. 8
    • C. 4
    • D. 16

  5. 5. Classes 0≤x<100 \le x < 10 and 10≤x<2010 \le x < 20 have frequencies 3 and 7. Estimate the mean.

    • A. 12
    • B. 10
    • C. 15
    • D. 8.5

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