Normal distribution curve:
A. Mean, median, mode are same
B. B/L symmetrical
C. Bell shape
D. SD is zero
E. Mean is one
Ans.
A, B, C
The standard
distribution curve (Normal distribution) is a perfectly symmetrical, bell
shaped curve such that the mean, median and mode, all have the same value and
coincide at the centre
Standard
Distribution Curve (Normal): Mean = Median = Mode
CHARACTERISTICS OF A NORMAL DISTRIBUTION CURVE:
Standard normal curve – smooth
Bell – shaped [MCQ]
Perfectly symmetrical
Based on infinitely larger number of observation
Total area of the curve is 1 [MCQ]
The mean is zero [MCQ]
Standard deviation is one [MCQ]
Mean, Median and Mode all coincide [MCQ]
Area in 1SD is 68.3% [MCQ]
Area in 2SD is 95.4% [MCQ]
Area in 3SD is 99.7% [MCQ]
