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WorksheetsCA FOUNDATION ELITE
Total questions: 15
Worksheet time: 15mins
Find out variance given that the AM = (8 + 4)/2
2
6
4
1
Coefficient of MD about mean for first 9 natural no. is
200/9
400/9
80
50
The quartile deviation is:
2/3 of SD
4/5 of SD
5/6 of SD
none
If mean = 5, SD = 2.6, median = 5 & QD = 1.5, then
the coefficient of QD equals
35
39
30
32
If variance = 148.6 and x‾ = 40, then the coefficient of
variation is:
37.15
30.48
33.75
none
If a variance of a random variable ‘x’ is 23, then what is
variance of 2x + 10?
56
33
46
92
If same amount is added to or subtracted from all the
values of an individual series then the standard deviation
and variance both shall be __
changed
unchanged
same
none
Standard Deviation for the marks obtained by a
student in monthly test in mathematic (out of 50) as
30,35,25,20,15 is
25
√50
√30
50
Coefficient of QD is 1/4 then Q3/Q1 is
5/3
4/3
3/4
3/5
S.D of first five consecutive natural numbers is
√10
√8
√3
√2
Which of the following is affected by shifting of scale.
SD
MD
QD
NONE
Sum of mean & SD of a series is a + b, if we add 2 to
each observation of series then the sum of mean and SD is
a + b + 2
6 − a + b
4 + a − b
none
The Q.D of 6 numbers 15,8,36,40,38,41 is equal to
12.5
25
13.5
37
If profits of a company remain same for the last 10
months then the S.D. of profits of the company would be:
Positive
Negative
Zero
(a) or (c)
Find the coefficient of mean deviation about mean for
the data: 5, 7, 8,10,11,13,19
17.28
28.57
32.11
18.56
