Probability and Statistics (3130006) MCQs

MCQs of Basic Statistics

Showing 11 to 20 out of 50 Questions
11.

Any measure indicating the center of a set of data, arranged in an increasing or decreasing order of magnitude is called a measure of ___________ .

(a)

Skewness

(b)

Central tendency

(c)

Dispersion

(d)

Symmetry

Answer:

Option (b)

12.

Suppose we have following obeservations 25, 13, 54, 56, 25. Determine the type of Kurtosis.

(a)

Mesokurtic

(b)

Leptokurtic

(c)

Platykurtic

(d)

None of this

Answer:

Option (c)

13.

The kurtosis defines the peakness of the curve in the region which is _________ .

(a)

Around the mode

(b)

Around the mean

(c)

Around the median

(d)

Around the variance

Answer:

Option (a)

14.

Find the correlation coefficient between x and y for the given values :

x 1 2 3 4 5 6
y 10 12 16 28 25 36
(a)

-1

(b)

-0.9025

(c)

1.0121

(d)

0.9516

Answer:

Option (d)

15.

Find rxy from the following data :

n=10, (x-x¯)(y-y¯)=1650, σx2=196, σy2=225 .

(a)

1.2354

(b)

0.7857

(c)

-6.3547

(d)

7.0857

Answer:

Option (b)

16.

The first four moment about x=2 are 1, 2.5, 5.5 and 16 . Calculate μ3 .

(a)

0

(b)

1

(c)

2

(d)

-1

Answer:

Option (a)

17.

Five student secured the following marks in Mathematics and Chemistry. Find Spearman's rank correlation.

Roll No. 1 2 3 4 5
Mathematics 36 77 72 62 82
Chemistry 51 82 60 71 86
(a)

8

(b)

-0.8

(c)

0.8

(d)

0

Answer:

Option (c)

18.

From the following data calculate the line x on y. 

  x y
Mean 60 67.5
S.D. 15 13.5

Here, r=0.50 .

(a)

x=0.5556y-22.50

(b)

y=0.556x-22.50

(c)

x=22.50y-0.556

(d)

y=22.50x-0.556

Answer:

Option (a)

19.

A standard curve passing through the origin was prepared for colrimetric estimation of sulphadiazine. The concentration and absorbance's are given below. Find byx .

Concentration (x) 5 10 15 20
Absorbance (y) 0.120 0.231 0.362 0.458
(a)

2.4

(b)

2

(c)

0.24

(d)

0.024

Answer:

Option (d)

20.

Find median of the given data.

x 1 2 3 4 5 6 7 8 99
f 9 6 4 10 12 7 8 13 14
(a)

0.6

(b)

1.6

(c)

6

(d)

-0.6

Answer:

Option (c)

Showing 11 to 20 out of 50 Questions