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.
In tabulation source of data,if any is shown in the
(a) Caption (b) stub (c) body (d) foot note
Solution.
(d) foot note
Solution
Q2.
Mode can be calculated from.
(a) cumulative frequency curve
(b) ogive curve
(c) histogram
(d) line diagram
Solution.
(c) histogram
Solution
Q3.
If x and y are related by x-y-20 = 0 and mode of x is 30, find the value of y.
(a) 10 (b) 20 (c) 30 (d) 5
Solution.
(a) 10
Solution
Q4.
For a moderately skewed distribution quartile deviation and the standard deviation are related by.
(a) SD = 3/2 QD
(b) SD = 4/3 QD (c) SD = QD (d) SD = 2/3 QD
Solution.
(a) SD = 3/2 QD
Solution
Q5.
Upper Quartile is equal .
(a) Q1 (b) P10 (c) D20 (d) P75
Solution.
(d) P75
Solution
Q6.
Find the value of
5C2 + 5C3 =
(a)6C3
(b) 6C4 (c) 6C1
(d) 5C3
Solution.
(a)6C3
NOTE : ncr + ncr+1 = n+1cr+1
Solution
Q7.
The intersection point of two regression lines gives
(a) Mean of x and y.
(b) MD of x only. (c) SD of x and y.
(d) None of these
Solution.
(a) Mean of x and y.
Solution
Q8.
rxy = 0.8 , find ruv if u = (x - 3)/3 , v = (y - 2)/4
(a) 0.9 (b) 0.3 (c) 0.8 (d) 0.7
Solution.
(c) 0.8
Solution
Q9.
An unbiased coin is tossed three times. The expected value of the number of heads is .
(a) 1 (b) 1.5 (c) 2.5 (d) 3
Solution.
(b) 1.5
Solution
Q10.
Parameter is a characteristic of .
(a) sample (b) probability distribution (c) population (d) none of these
Solution.
(c) population
Solution
