Probability and Statistics (3130006) MCQs

MCQs of Basic Statistics

Showing 41 to 40 out of 50 Questions
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41.

The equation of regression line y on x is  __________ .

(a)

(y-y¯)=bxy(x-x¯)

(b)

(x-x¯)=bxy(y-y¯)

(c)

(y-y¯)=byx(x-x¯)

(d)

(x-x¯)=byx(y-y¯)

Answer:

Option (c)

42.

The correlation coefficient between income and expenditure is ___________ .

(a)

Positive
(b)

Negative
(c)

Zero
(d)

None of these
Answer:

Option (a)

43.

If two regression coefficients are -0.9 and -0.1, the value of correlation coefficient is __________ .

(a)

0.3
(b)

0.5
(c)

-0.3
(d)

-0.5
Answer:

Option (a)

44.

The relation beween mean, median and mode is  ___________ .

(a)

M=3 x¯ -2Z
(b)

Z=3M-2 x¯

(c)

Z=2 x¯ -3M
(d)

x¯ =M=Z
Answer:

Option (b)

45.

The first four moments of a distribution X=2 are -2, 12, -20 and 100. Calculate the Kurtosis.

(a)

2.80
(b)

-2.08
(c)

-2.80
(d)

2.08
Answer:

Option (d)

46.

The first four moments of a distribution about X=2 are -2, 12, -20 and 100. Calculate the skewness.

(a)

1.117
(b)

1.17
(c)

1.71
(d)

1.07
Answer:

Option (b)

47.

The moment about origin are -3, 90, -900, 21000. Find the moment about actual mean.

(a)

μ1=0, μ2=18, μ3=-144, μ4=14817

(b)

μ1=0, μ2=81, μ3=144, μ4=14817

(c)

μ1=0, μ2=81, μ3=-144, μ4=14871

(d)

μ1=0, μ2=81, μ3=-144, μ4=14817

Answer:

Option (d)

48.

The lowest value of variance can be ____________ .

(a)

1
(b)

3
(c)

-3
(d)

0
Answer:

Option (d)

49.

The mean deviation of the values 18, 12, 15 is __________ .

(a)

6
(b)

0
(c)

2
(d)

3
Answer:

Option (c)

50.

The standard deviation is always __________ than the mean deviation.

(a)

Greater 
(b)

Less
(c)

Equar
(d)

None of these
Answer:

Option (a)

Showing 41 to 40 out of 50 Questions
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