The standard deviation of 2, 4, 4, 4, 5, 5, 7, 9 is: Mean=5, deviations squared sum=32, variance=4, SD=2
Q1. The standard deviation of 2, 4, 4, 4, 5, 5, 7, 9 is: Mean=5, deviations squared sum=32, variance=4, SD=2
Answer: 2
Explanation: With mean = 5 and sum of squared deviations = 32 over 8 values, variance = 32/8 = 4, so standard deviation = √4 = 2.