Practice Test: Question Set - 01
1. The resultant population is normally distributed,
- (A) When
populations of two normally distributed random variables are added
- (B) When
populations of two normally distributed random variables are subtracted
- (C) When
populations of two normally distributed random variables are multiplied
- (D) Any
one of above
2. Dispersion of population is
- (A) Spread
of data or extend to which the observations are scattered
- (B) Midpoint
of distribution where most of the data cluster
- (C) Concentration
of data at either low or high end
- (D) Distribution
with sharp peak
3. Standard deviation is
- (A) Square
of standard variable
- (B) Arithmetic
mean
- (C) Root
mean square deviation from the mean
- (D) Deviation
from mean in units of standard deviation
4. When population Y with means μY is subtracted from population X with mean μX, the mean of resultant population is given by,
- (A) μX + μY
- (B) μX - μY
- (C) μX μY
- (D) μX/μY
5. Histogram is
- (A) A
set of rectangles
- (B) A
line graph of class frequency plotted against class marks
- (C) A
bell shaped smooth curve
- (D) None
of the above
6. The area below normal curve from (Z = -1) to (Z = +1) is
- (A) 1
- (B) 0.6827
- (C) 0.9545
- (D) 0.9973
Where, Z is standard variable
7. When two populations with means μX and μY are added, the mean of resultant population is given by,
- (A) μX + μY
- (B) μX - μY
- (C) μX μY
- (D) μX/μY
8. Frequency polygon is
- (A) A set of
rectangles
- (B) A
line graph of class frequency plotted against class marks
- (C) A
bell shaped smooth curve
- (D) None
of the above
9. When population X with mean μX, is divided by population Y with mean μY, the mean of resultant population is given by,
- (A) μX + μY
- (B) μX - μY
- (C) μX μY
- (D) μX/μY
10. Central tendency of population is measured in units of
- (A) Standard
deviation
- (B) Arithmetic
mean
- (C) Standard
variable
- (D) Square
of standard deviation
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