1
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
2
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
3
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
4
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+2
-0

If the standard deviation of data is 12 and mean is 72, then coefficient of variation is

A
15.67%
B
14.67%
C
13.67%
D
16.67%
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