For an open-end frequency distribution, a suitable measure of central tendency is: MCQ with Answer and Explanation

For an open-end frequency distribution, a suitable measure of central tendency is:

A. Median

B. Arithmetic mean

C. Geometric mean

D. Mode

Answer: Option A

The median can be determined even if the extremes are open-ended, as long as the median class is closed.

This question belongs to: Accountancy and Statistics Statistics

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Question #1 Report Error

A box contains 3 defective and 7 non-defective items. Two items are selected at random. The probability that exactly one is defective is:

A. 7/15

B. 1/5

C. 14/45

D. 21/45

Correct Answer: Option A

Explanation:
Total C(10,2)=45. Favorable: 3×7=21. Probability=21/45=7/15.

This question belongs to: Accountancy and Statistics Statistics

Question #2 Report Error

The WPI base year 2011-12 replaced which previous base year?

A. 2010

B. 2004-05

C. 1993-94

D. 2000-01

Correct Answer: Option B

Explanation:
The previous WPI series had base 2004-05.

This question belongs to: Accountancy and Statistics Statistics

Question #3 Report Error

A person travels from A to B at 40 km/h and returns from B to A at 60 km/h. His average speed for the whole journey is:

A. 50 km/h

B. 48 km/h

C. 45 km/h

D. 52 km/h

Correct Answer: Option B

Explanation:
For equal distances, use Harmonic Mean: 2ab/(a+b) = 2(40)(60)/(100) = 4800/100 = 48 km/h.

This question belongs to: Accountancy and Statistics Statistics