ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 422  427 of 469
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Question number: 422
» 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: 423
» Statistical Methods » Partial and Multiple Correlations
Question
If is the Coefficient of Correlation then which of the following indicates the strongest relationship?
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 424
» Statistical Methods » Association and Contingency
Question
Which of the following statement is/are correct regarding contingency table?
Choices
Choice (4)  Response  

a.  Independent variables are used as column headings in a contingency table. 

b.  Dependent variable are used as row headings in a contingency table. 

c.  Both a. and b. are correct 

d.  None of the above 

Question number: 425
» Statistical Methods » Bivariate Normal Distribution
Question
Let the random variable where and ∑= then, will follow ________ distribution.
Choices
Choice (4)  Response  

a. 


b. 


c. 


d.  None of the above 

Passage
Rama is trying to predict the weight of a newborn given some information about its mother and prenatal care. A1 is the birth weight, it is the criterion. A2 is the mothers weight before getting pregnant, A3 is how many cigarettes a day the mother smoked during pregnancy, A4 is how much weight the mother gained during pregnancy and A5 is how far into the pregnancy the mother was when she began receiving prenatal care. Here is a correlation matrix of the correlations between pairs of variables Use this matrix to answer the following questions.
A1  A2  A3  A4  A5  
A1  1.000  
A2  0.543  1.000  
A3  0.341  0.932  1.000  
A4  0.682  0.192  0.435  1.000  
A5  0.821  0.472  0.001  0.311  1.000 
Question number: 426 (1 of 3 Based on Passage) Show Passage
» Statistical Methods » Partial and Multiple Correlations
Question
Which of the variables is likely to be the single best predictor of birth weight of a newborn?
Choices
Choice (4)  Response  

a.  A3 

b.  A4 

c.  A2 

d.  A5 

Question number: 427 (2 of 3 Based on Passage) Show Passage
» Statistical Methods » Partial and Multiple Correlations
Question
What is the coefficient of determination for the relationship between smoking and mothers’ weight?
Choices
Choice (4)  Response  

a. 


b. 


c.  0.868 

d.  None of the above 
