If class intervals are inclusive, before plotting a histogram we must: MCQ with Answer and Explanation

If class intervals are inclusive, before plotting a histogram we must:

A. Convert them to exclusive by adjusting boundaries

B. Use cumulative frequencies

C. Plot directly

D. Change class width

Answer: Option A

Inclusive intervals have gaps; adjusting by half of the gap makes them continuous.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

A car travels 60 km/h for the first half of a distance and 40 km/h for the second half. The average speed (km/h) is:

A. 50

B. 45

C. 48

D. 52

Correct Answer: Option C

Explanation:
Harmonic mean of speeds: 2 / (1/60 + 1/40) = 2 / (5/120) = 240/5 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The process of arranging data in rows and columns is called:

A. Summarization

B. Compilation

C. Classification

D. Tabulation

Correct Answer: Option D

Explanation:
Tabulation is the systematic arrangement of data in rows and columns for easy comparison and analysis.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

The median of 5, 3, 8, 10, 12, 15 is:

A. 8

B. 9

C. 12

D. 10

Correct Answer: Option B

Explanation:
Ordered: 3,5,8,10,12,15. Even number, median = (8+10)/2 = 9.

This question belongs to: Accountancy and Statistics Statistics