general math MCQ #12059

The standard deviation of 2, 4, 4, 4, 5, 5, 7, 9 is: Mean=5, deviations squared sum=32, variance=4, SD=2

general math MCQ #12059

  1. Question 1

    Q1. The standard deviation of 2, 4, 4, 4, 5, 5, 7, 9 is: Mean=5, deviations squared sum=32, variance=4, SD=2

    • A) 4
    • B) 3
    • C) 2
    • D) 1

    Answer: 2

    Explanation: With mean = 5 and sum of squared deviations = 32 over 8 values, variance = 32/8 = 4, so standard deviation = √4 = 2.