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
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
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
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:
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
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 
