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Basic statistics

Class 10 · Mathematics · 5 questions

Name: ____________________   Date: ____________

  1. What is the mean of the data 10, 20, 30, 40?

    • A 20
    • B 100
    • C 30
    • D 25

  2. The median of 2, 4, 6, 8 is:

    • A 6
    • B 4
    • C 5
    • D 20

  3. The most frequent value in a data set is the:

    • A Mode
    • B Median
    • C Mean
    • D Range

  4. The standard deviation measures:

    • A The mode
    • B Spread of the data
    • C The mean only
    • D The total

  5. The variance is:

    • A The range squared
    • B The same as the mode
    • C The square root of the mean
    • D The square of the standard deviation

Answer key

1. D, 2. C, 3. A, 4. B, 5. D

  1. Sum = 100, divided by 4 gives 25.

  2. The mean of the middle two values: (4 + 6) / 2 = 5.

  3. The mode is the value that occurs most often.

  4. It shows how far values lie from the mean.

  5. Variance = (standard deviation)2.