In data classification, 'class width' refers to: MCQ with Answer and Explanation

In data classification, 'class width' refers to:
A. The frequency of the modal class
B. The midpoint of a class interval
C. The difference between upper and lower class limits
D. The number of classes in the distribution
Answer: Option C
Solution (By JKSSB Mock Tests)
Class width (or class size) is the difference between the upper and lower boundaries of a class interval, determining the range of values grouped together in a frequency distribution.

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Practice More Statistics Questions

Question #1
If the events A and B are independent, P(A)=0.4, P(B)=0.5, then P(A'∩B') is:
A. 0.5
B. 0.2
C. 0.3
D. 0.9

Correct Answer: Option C


Explanation:
P(A')=0.6, P(B')=0.5, independence gives 0.6×0.5=0.3.

This question belongs to: Accountancy and Statistics Statistics
Question #2
A life table radix l₀ of 100,000 means:
A. Number of deaths
B. A hypothetical cohort of 100,000 births
C. Life expectancy
D. The population size

Correct Answer: Option B


Explanation:
l₀ is the initial number of individuals in the life table cohort.

This question belongs to: Accountancy and Statistics Statistics
Question #3
Assertion (A): Harmonic mean is greater than geometric mean for positive numbers. Reason (R): For positive numbers, AM ≥ GM ≥ HM.
A. Both A and R true, but R is not correct explanation
B. A is true, R is false
C. Both A and R true, and R is correct explanation
D. A is false, R is true

Correct Answer: Option D


Explanation:
The correct inequality is AM ≥ GM ≥ HM, so HM ≤ GM, thus HM is not greater. So assertion false, reason true.

This question belongs to: Accountancy and Statistics Statistics