1
MHT CET 2023 9th May Morning Shift
MCQ (Single Correct Answer)
+2
-0

The standard deviation of the following distribution

$$\mathrm{C.I.}$$ 0 - 6 6 - 12 12 - 18
$$\mathrm{f_i}$$ 2 4 6

is

A
5$$\sqrt2$$
B
$$\sqrt5$$
C
2$$\sqrt5$$
D
20
2
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+2
-0

The variance and mean of 15 observations are respectively 6 and 10 . If each observation is increased by 8 then the new variance and new mean of resulting observations are respectively

A
6, 18
B
6, 10
C
14, 10
D
14, 18
3
MHT CET 2021 24th September Evening Shift
MCQ (Single Correct Answer)
+2
-0

For the set of 50 observations, the sum of their squares is 3050 , their arithmetic mean is 6. Hence the standard deviation of these observations is

A
5
B
3
C
4
D
6
4
MHT CET 2021 24th September Morning Shift
MCQ (Single Correct Answer)
+2
-0

The arithmetic mean of marks in Mathematics for four divisions A, B, C and D were $$80,75,70$$ and 72 respectively. Their standard deviations were $$12,6,8$$ and 10 respectively. Then, division ______ has more uniformity.

A
D
B
B
C
C
D
A
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