Statistics Test

Result

Statistics Test - 2

Score
-
out of -
Rank
-
out of -

TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

A batsman scores runs in 10 innings as 38,70,48,34,42,55,63,46,54 and 44 , then the mean score is

A
0.494

B
494

C
4.94

D
49.4

Solution

Mean (x) = (38+70+48+34+42+55+63+46+54+44)/10

;= 494/10

;= 49.4
Question 2
1 / -0

The two lines of regression are x + 4y = 3 and 3x +y = 15 . value of x for y = 3 is

A
- 9

B
- 4

C
9

D
4

Solution

we have x + 4y = 3 and 3x + y = 15 as the lines of regression of y on x and x on y respectively.

therfore, for y = 3 the required line is x on y

so put y= 3 in 3x + y = 15

we get, x = 4
Question 3
1 / -0

Which one of the following average is most affected of extreme observations ?

A
A. M.

B
Mode

C
G.M.

D
Median

Solution

As A/M is calculated as the sum of all the observations divided by number of observations, so it is affected by if there is any change in the outliers