Question 34
StatisticsFind the variance of 1, 2, 0, −3, 5, −2, 4.
- A.52/7
- B.40/7
- C.32/7
- D.27/7
Show the answer and explanation
Answer: A (52/7)
Explanation
Mean = 7/7 = 1. Squared deviations 0, 1, 1, 16, 16, 9, 9 add to 52, so variance = 52/7.
Find the variance of 1, 2, 0, −3, 5, −2, 4.
Answer: A (52/7)
Mean = 7/7 = 1. Squared deviations 0, 1, 1, 16, 16, 9, 9 add to 52, so variance = 52/7.