Unit-7:
(a)Permutation and combination, probability
(b)Inequalities
(c)Statistical description of data
(d)Measurement of central tendency
(e)Mesurement of dispersion
(f)correlation and regression
(g)Binomial, Poisson and Normal distribution
(h)Linear Programming problem
Q1.
The frequency distribution should be __________ to draw Histogram .
(a) Exclusive type (b) Inclusive type
(c) both type (d) None of these
Solution.
(a) Exclusive type
Solution
Q2.
Circular diagrams are always
(a) Two dimensional (b) One - dimensional (c) Three dimensional (d) None of these
Solution.
(a) Two dimensional
Solution
Q3.
The choronological classification of data are classified on the basis of
(a) Attribute (b) Time (c) Area (d) Class-interval
Solution.
(b) Time
Solution
Q4.
For a moderately skewed distribution Quartile deviation and mean deviation are related by.
(a) QD = 5/6 MD (b) QD = MD
(c) QD = 3/2 MD (d) QD = 2/3 MD
Solution.
(a) QD = 5/6 MD
Solution
Q5.
Ratio average are :
(a) HM and GM (b) AM and GM (c) HM and GM (d) only AM
Solution.
(c) HM and GM
Solution
Q6.
1000C90 = 999C89 + 999Cx . find x
(a) 999 (b) 90 (c) 80 (d) 89
Solution.
(b) 90
Solution
Q7.
If coefficient of correlation between x and y is 0.56 , find coefficient of correlation between x and y/2 .
(a) 0.48
(b) -1 (c) 1 (d) 0.56
Solution.
(d) 0.56
Solution
Q8.
If two variables are uncorrelated, their regression lines are .
(a) Perpendicular (b) Parallel (c) Coincident
(d) None of these
Solution.
(a) Perpendicular
Solution
Q9.
If every 12th unit is selected from universal set then this type of sampling is known as.
(a) Stratified sampling
(b) Quota sampling (c) Systematic sampling (d) None of these
Solution.
(c) Systematic sampling
Solution
Q10.
In Binomial distribution B(n,p), the mean = 6 and variance = 2 then p is.
(a) 4/5 (b) 2 (c) 1 (d) 2/3
Solution.
(d) 2/3
Solution
