Statistics Test

Result

Statistics Test - 9

Score
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out of -
Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

If x is a positive integer, then mode of the observations 3x + 4, 3x - 2, 4x + 5, 2x - 1, 3x - 1, 5x can be

A
3

B
8

C
1

D
9

Solution

The numbers are
3x + 4, 3x - 2, 4x + 5, 2x - 1, 3x - 1, 5x for x = 1
Therefore, the value can be
7, 1, 9, 1, 2, 5
∴ 1 is mode.
Hence x = 1
Question 2
1 / -0

The median of 27 observations is 20. If two observations 15 and 24 are included into the observations, then the median of new series is

A
15

B
20

C
24

D
16

Solution

Total number of observations = 27
Median = 20
Two numbers 15 and 24 are added.
∴Total number = 27 + 2 = 29
One number is less than 20 and other is more than 20.
∴ Median remains same, i.e. 20