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The mean of 100 observations is 60. What will be the new value of mean if 8 1s subtracted from each observation and then divided by 4.

A) 50
B) 52
C) 13
D) 14

Correct Answer:



C) 13

Description for Correct answer:
The mean of 100 observation is 60.

Total = \( \Large 100 \times 60 \) = 6000

If 8 is subtracted from each observation then the new total

=\( \Large 6000 - 800 = 5200 \)

=\( \Large \frac{5200}{4} = 1300 \)

Therefore, New mean = \( \Large \frac{1300}{100} = 13 \)

Part of solved Statistics questions and answers : >> Elementary Mathematics >> Statistics

Comments

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