Question 39
Measures of DispersionThe height of 4 orange seedlings: are 2 cm, 5 cm, 7 cm and 10 cm. Calculate the variance
- A.7.2
- B.6.0
- C.8.5
- D.9.1
Show the answer and explanation
Answer: C (8.5)
Explanation
The mean is 24/4 = 6. Squared deviations 16, 1, 1, 16 add to 34, so the variance is 34/4 = 8.5.