ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 429  432 of 472
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Question number: 429
» Statistical Methods » Dispersion
Question
The marks of 10 students in a particular examination are as follows:
10  12  15  12  16  20  13  17  15  10 
Later, it was decided that 5 bonus marks will be awarded to each student. The variances in the later case will ________ as compared with the first case.
Choices
Choice (4)  Response  

a.  Increase 

b.  Not change 

c.  Decrease 

d.  Can’t say 

Question number: 430
» Statistical Methods » Dispersion
Question
The means of two samples of sizes 50 and 100 respectively are 54.1 and 50.3; the standard deviations are 8 and 7. The standard deviations of the sample of size 150 by combining the two samples will be________.
Choices
Choice (4)  Response  

a.  8.45 

b.  7.56 

c.  6.33 

d.  None of the above 

Question number: 431
» Statistical Methods » Curve Fitting and Orthogonal Polynomials
Question
The linear least squares approximation of on using monomial polynomials is . Then the values of and is ________ and ________ respectively.
Choices
Choice (4)  Response  

a.  and 

b.  and 

c.  and 

d.  and 

Question number: 432
» Statistical Methods » Skewness and Kurtosis
Question
Which of the following statement is/are correct regarding Kurtosis of the data?
Choices
Choice (4)  Response  

a.  Positive kurtosis indicates a relatively flat distribution 

b.  Negative kurtosis indicates a relatively peaked distribution 

c.  None of the above 

d.  Question does not provide sufficient data or is vague 
