ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 415 - 420 of 472

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Question number: 415

» Statistical Methods » Bivariate Normal Distribution

MCQ▾

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.

Table showing the correlation matrix

correlation matrix of the correlations between pairs of variables

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: 416 (1 of 3 Based on Passage) Show Passage

» Statistical Methods » Partial and Multiple Correlations

MCQ▾

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

Question number: 417 (2 of 3 Based on Passage) Show Passage

» Statistical Methods » Partial and Multiple Correlations

MCQ▾

Question

In this matrix, what is the correlation between smoking and weight gain?

Choices

Choice (4) Response

a.

-0.932

b.

-0.341

c.

-0.435

d.

0.001

Question number: 418 (3 of 3 Based on Passage) Show Passage

» Statistical Methods » Partial and Multiple Correlations

MCQ▾

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: 419

» Statistical Methods » Curve Fitting and Orthogonal Polynomials

MCQ▾

Question

The quadratic least squares approximation of on using monomial polynomials is . Then the values of is ________, is ________ and is ________.

Choices

Choice (4) Response

a.

and

b.

and

c.

and

d.

and

Question number: 420

» Statistical Methods » Collection, Compilation and Presentation of Data

MCQ▾

Question

The data of socio economic status of people living in a particular area, can be categorized as ________.

Choices

Choice (4) Response

a.

Quantitative Data

b.

Qualitative Data

c.

None of the above

d.

Question does not provide sufficient data or is vague

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