If the arithmetic mean of a sample is 20 and median is 22, the distribution is likely: MCQ with Answer and Explanation

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If the arithmetic mean of a sample is 20 and median is 22, the distribution is likely:

A. Normal

B. Positively skewed

C. Negatively skewed

D. Symmetric

Answer: Option C

Solution (By JKSSB Mock Tests)

Mean < Median suggests negative skewness (left-skewed).

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1

Perinatal Mortality Rate combines:

A. Neonatal and post-neonatal deaths

B. Maternal and infant deaths

C. Deaths from congenital anomalies only

D. Late fetal deaths (stillbirths ≥28 weeks) and early neonatal deaths (0-6 days)

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Correct Answer: Option D

Explanation:
Perinatal mortality, as defined by WHO, includes stillbirths from 28 weeks gestation and deaths in the first week of life, capturing risks around the time of birth for comprehensive assessment.

This question belongs to: Accountancy and Statistics Statistics

Question #2

Given P(A)=0.5, P(B)=0.3, P(A∩B)=0.1. Are A and B independent?

A. No, because 0.1 ≠ 0.15

B. Cannot determine

C. Yes, because they are mutually exclusive

D. Yes, because P(A∩B)=P(A)P(B)

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Correct Answer: Option A

Explanation:
P(A)P(B)=0.5×0.3=0.15 ≠ 0.1, so not independent.

This question belongs to: Accountancy and Statistics Statistics

Question #3

Life expectancy at birth in India (2014-18) is approximately:

A. 65 years

B. 60 years

C. 72 years

D. 69 years

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Correct Answer: Option D

Explanation:
As per SRS 2014-18, life expectancy at birth was 69 years (male 68.2, female 70.7).

This question belongs to: Accountancy and Statistics Statistics

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