In a normal distribution, approximately what percentage of data falls within Mean ± 1 Standard Deviation? MCQ with Answer and Explanation

In a normal distribution, approximately what percentage of data falls within Mean ± 1 Standard Deviation?
A. 95.45%
B. 68.27%
C. 50%
D. 99.73%
Answer: Option B
Solution (By JKExamLibrary)
According to the empirical rule for normal distributions, roughly 68.27% of observations lie within one standard deviation of the mean.

This question belongs to: Accountancy and Statistics Statistics

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Practice More Statistics Questions

Question #1 Report Error
The arithmetic mean of 10, 20, 30, 40, 50 is:
A. 40
B. 30
C. 25
D. 35

Correct Answer: Option B


Explanation:
Sum = 150, number = 5, mean = 150/5 = 30.

This question belongs to: Accountancy and Statistics Statistics
Question #2 Report Error
Which mean is the largest for a set of positive numbers?
A. Arithmetic mean
B. Geometric mean
C. All are equal
D. Harmonic mean

Correct Answer: Option A


Explanation:
For positive numbers, AM ≥ GM ≥ HM.

This question belongs to: Accountancy and Statistics Statistics
Question #3 Report Error
The consistency condition (A) ≥ (AB) is:
A. Always true
B. Sometimes false
C. A necessary condition for data consistency
D. Both A and C

Correct Answer: Option D


Explanation:
It is always logically true that the number possessing A cannot be less than those possessing both A and B, and it is required for consistency.

This question belongs to: Accountancy and Statistics Statistics