Variance of {2, 4, 6, 8, 10}:
A2
B4
C8
D10
Answer & Solution
Correct answer: C. 8
Mean = 6. Deviations: -4, -2, 0, 2, 4. Squared: 16, 4, 0, 4, 16. Sum = 40. Variance = 40/5 = 8.
Related questions
Uppercase letters such as A and B are used in probability notation to represent:An experiment is repeated far more often, and the observed proportion moves toward the theDrawing one card from a full deck, the probability it is a spade is 13 out of:Drawing two cards from a 52-card deck without replacement, the denominator for the second If the name is kept out instead, each member of the population can be chosen:A name is drawn from a hat and then put back before the next draw. That sampling is done:A sample space can be shown by listing outcomes, by a Venn diagram or by a:For independent events that conditional term simplifies, so the chance of both is found by