Statistics Test

Result

Statistics Test - 23

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

If correlation between x and y is r, then between y and x correlation will be

A
–r

B
1/r

C
r

D
1– r
Question 2
4 / -1

The variables x and y represent height in cm and weight in gm respectively. The correlation between x and y has the unit

A
gm

B
cm

C
gm. cm

D
None of these
Question 3
4 / -1

The coefficient of correlation for the following will be approximately

A
0.90

B
0.96

C
– 0.90

D
– 0.96

Solution
Question 4
4 / -1

If
x 3 4 8 6 2 1
Y 5 3 9 6 9 2
then the coefficient of correlation will be approximately

A
0.49

B
0.40

C
– 0.49

D
– 0.40

Solution
Question 5
4 / -1

For the following data
x 10 7 12 12 9 16 12
y 6 4 7 8 10 7 10
the value of r will be

A
0.207

B
– 0.207

C
0.287

D
– 0.287

Solution
Question 6
4 / -1

For the data
x 4 7 8 3 4
y 5 8 6 3 5

the Karl Pearson\'s coefficient is

A

B
63

C

D

Solution
Question 7
4 / -1

If X and Y are independent variable, then correlation coefficient is

A
1

B
–1

C

D
0
Question 8
4 / -1

If the coefficient of correlation is positive, then for the values of the variables x,y when the value of x increases perfectly, then

A
The value of y increases

B
The value of y decreases

C
The value of y remains constant

D
Nothing can be said
Question 9
4 / -1

Two numbers within the bracket denote the ranks of 10 students of a class in two subject : (1, 10), (2, 9), (3, 8), (4, 7), (5, 6), (6, 5), (7, 4), (8, 3), (9, 2), (10, 1), then rank correlation coefficient is

A
0

B
–1

C
1

D
0.5

Solution
Question 10
4 / -1

The value of the correlation coefficient between two variables lies between

A
0 and 1

B
–1 and 1

C
0 and ∞

D
–∞ and 0