Statistics Test

Result

Statistics Test - 3

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Weekly Quiz Competition

Question 1
1 / -0

The Mode of the following items is 0,1,6,7,2,3,7,6,6,2,6,0,5,6,0.

A
0

B
2

C
5

D
6

Solution

6 is the most frequent value here.
Question 2
1 / -0

The statistical method which helps us to estimate or predict the unknown value of one variable from the known value of the related variable is called

A
scatter diagram

B
dispersion

C
correlation

D
regression

Solution

It follows from the definition of regression
Question 3
1 / -0

The coefficient of correlation r satisfies

A
− 1 < r < 0

B
I r I ≤ 1

C
I r I > 1

D
0 < r < 1

Solution

r can't be numerically more than 1
Question 4
1 / -0

The most stable measure of central tendency is

A
mean

B
median

C
mode

D
range

Solution

because takes into account every value in the given set of data to provide the average
Question 5
1 / -0

The mean weight of a group of 10 items is 28 and that of another group of n items is 35.The mean of combined group of 10 + n items is found to be 30. The value of n is

A
2

B
4

C
10

D
12

Solution

sum of weights of 10 items =280

sum of weights of n items = 35n

so, sum of weights of ( 10 + n) items = 280 + 35n

so ,mean = (280 + 35 n) / ( 10 + n)

30(10 + n ) = 280 + 35n

solving we get, n = 4
Question 6
1 / -0

The measure of variation which is least affected by extreme items is

A
standard deviation

B
quartile deviation

C
range

D
mean deviation

Solution

as it only depends on upper and lower quartile not on extreme values
Question 7
1 / -0

A group of 10 items has mean 6. If the mean of 4 of these items is 7.5, then the mean of the remaining items is

A
5.5

B
4.5

C
5.0

D
6.5

Solution

sum of 10 items = 60

sum of 4 items = 30

sum of remaining items = 30

their mean = 30/6=5

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Re-Attempt Weekly Quiz Competition

Statistics Test - 3

Result

Statistics Test - 3

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Rank

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SHARING IS CARING

Question 1

0

2

5

6

Solution

Question 2

scatter diagram

dispersion

correlation

regression

Solution

Question 3

− 1 < r < 0

I r I ≤ 1

I r I > 1

0 < r < 1

Solution

Question 4

mean

median

mode

range

Solution

Question 5

2

4

10

12

Solution

Question 6

standard deviation

quartile deviation

range

mean deviation

Solution

Question 7

5.5

4.5

5.0

6.5

Solution

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