Statistics Test

Result

Statistics Test - 21

Score
-
out of -
Rank
-
out of -

TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

If r is the correlation coefficient between two variables, then

A
r ≥ 1

B
r ≤ 1

C
|r| ≤ 1

D
|r| ≥ 1
Question 2
4 / -1

If r is the coefficient of correlation and Y = a + bX, then |r| =

A
a/b

B
b /a

C
1

D
None of these
Question 3
4 / -1

A
22

B
2

C
–2

D
None of these

Solution
Question 4
4 / -1

Karl Pearson\'s coefficient of correlation is dependent

A
Only on the change of origin and not on the change of the scale

B
Only on the change of scale and not on the change of origin

C
On both the change of origin and the change of scale

D
Neither on the change of scale nor on the change of origin
Question 5
4 / -1

A

B

C

D

Solution
Question 6
4 / -1

A
0.2

B
0.5

C
0.66

D
0.33

Solution
Question 7
4 / -1

A
0.89

B
0.76

C
0.91

D
0.98

Solution
Question 8
4 / -1

If coefficient of correlation between the variables x and y is zero, then

A
Variables x and y have no relation

B
y decreases as x increases

C
y increases as x increases

D
There may be a relation between x and y
Question 9
4 / -1

A
1

B
–1

C
2/3

D
–2/3

Solution
Question 10
4 / -1

Karl Pearson\'s coefficient of rank correlation between the ranks obtained by ten students in Mathematics and Chemistry in a class test as given below is
Rank in Mathematics 1 2 3 4 5 6 7 8 9 10
Rank in Chemistry 3 10 5 1 2 9 4 8 7 6

A
0.224

B
0.204

C
0.240

D
None of these

Solution