A random variable X has expected value E(X) = 5 and E(X²) = 29. The variance is: MCQ with Answer and Explanation

Explanation:
Cost of Living Index measures changes in retail prices of goods and services consumed by households, essentially the Consumer Price Index.

Explanation:
Consistency requires that all derived class frequencies (including ultimate classes) are non-negative, as negative counts are logically impossible in real-world data.

Explanation:
Stock exchange reports provide financial data, not population statistics.