Statistics Test

Result

Statistics Test - 22

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
4 / -1

The coefficients of correlation between the heights (in inches) of fathers and sons from the following data will be
Heights of fathers (x) 65 66 67 68 69 70 71
Heights of sons (y) 67 68 66 69 72 72 69

A
0.60

B
– 0.60

C
– 0.67

D
0.67

Solution
Question 2
4 / -1

A
0

B
1/2

C
1/4

D
1

Solution
Question 3
4 / -1

For the following pairs of observations (1, 10), (2, 9), (3, 9), (4, 8), (5, 6), (6, 12), (7, 4), (8, 3), (9, 13), (10, 1), then Cov (x, y) =

A
1.05

B
2.45

C
– 4.45

D
– 4.9

Solution
Question 4
4 / -1

A
1

B
0

C
–1

D
None of these

Solution
Question 5
4 / -1

If the variances of two variables x and y are respectively 9 and 16 and their covariance is 8, then their coefficient of correlation is

A

B

C

D

Solution
Question 6
4 / -1

A

B

C

D
None of these
Question 7
4 / -1

In a scatter diagram, the points are scattered equally in a corners of a quadrants, then

A
r = 1

B
r = –1

C
r = 0

D
Question 8
4 / -1

The points of scatter diagram in perfect positive correlation are situated at the line

A
y = – x

B
y = x

C
y = 2x

D
y = – 2x
Question 9
4 / -1

If r = 0.2, then linear correlation will be necessarily

A
Perfect

B
Negative

C
Very low

D
Very high
Question 10
4 / -1

If r = – 0.97, then

A
Correlation is negative and curved

B
Correlation is linear and negative

C
Correlation is in third and fourth quadrant

D
None of the above