The mean of 15 observations is 40. It was found that an observation 23 was wrongly recorded as 32. The correct mean is: MCQ with Answer and Explanation
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Question #1
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In a set of 10 numbers, the mean of the first 6 is 15 and the mean of the remaining 4 is 20. The combined mean is:
Correct Answer: Option D
Explanation:
Sum = 6×15 + 4×20 = 90+80=170. Combined mean = 170/10 = 17.
Sum = 6×15 + 4×20 = 90+80=170. Combined mean = 170/10 = 17.
This question belongs to:
Accountancy and Statistics
Statistics
Question #2
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Census of India 2011 was the:
Correct Answer: Option B
Explanation:
Since the first synchronous census in 1881, the 2011 census was the 15th decennial census.
Since the first synchronous census in 1881, the 2011 census was the 15th decennial census.
This question belongs to:
Accountancy and Statistics
Statistics
Question #3
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Which of the following best defines primary data?
Correct Answer: Option B
Explanation:
Primary data is original data collected firsthand by the investigator specifically for the current research purpose, distinguishing it from secondary data which is pre-existing.
Primary data is original data collected firsthand by the investigator specifically for the current research purpose, distinguishing it from secondary data which is pre-existing.
This question belongs to:
Accountancy and Statistics
Statistics
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