ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 441 - 444 of 472

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Question number: 441

» Statistical Methods » Regression - Linear and Polynomial

MCQ▾

Question

If the coefficient of determination of a simple linear regression is 0.65. This results means that________.

Choices

Choice (4) Response

a.

65 % of the total variation is explained by the dependent variable

b.

The correlation coefficient is 0.65 also

c.

The relationship between two variables is negative

d.

65 % of the total variation is explained by the independent variable

Question number: 442

» Statistical Methods » Dispersion

MCQ▾

Question

What is the relation between the mean deviation (M. D. ) from the mean and the standard deviation (S. D. ) of the A. P.

Choices

Choice (4) Response

a.

No relationship exist between S D and M D

b.

S D < M D

c.

S D = M D

d.

S D > M D

Question number: 443

» Statistical Methods » Dispersion

MCQ▾

Question

In a study to test the effectiveness of a new variety of wheat, an experiment was performed with 50 experimental fields and the following results were obtained:

Table showing the study to test the effectiveness of a new variety of wheat

experiment was performed with 50 experimental fields

Yield per Hectare (in quintals)

Number of Fields

31 - 35

2

36 - 40

3

41 - 45

8

46 - 50

12

51 - 55

16

56 - 60

5

61 - 65

2

66 - 70

2

The mean yield per hectare is 50 quintals. Determine the standard deviation of the above distribution.

Choices

Choice (4) Response

a.

63

b.

7.61

c.

7.93

d.

58

Question number: 444

» Statistical Methods » Collection, Compilation and Presentation of Data

MCQ▾

Question

Which of the following statement is/are correct regarding Statistical Presentation of data?

Choices

Choice (4) Response

a.

Mean is a partition value which divides the series into two nearly equal parts and remains the centre of gravity.

b.

Mode of a data remains unaffected in presence of outliers.

c.

Mean is more robust statistics than median.

d.

None of the above

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