ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 431 - 435 of 461

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Question number: 431

» Statistical Methods » Dispersion

MCQ▾

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.

6.33

b.

7.56

c.

8.45

d.

Question does not provide sufficient data or is vague

Question number: 432

» Statistical Methods » Curve Fitting and Orthogonal Polynomials

MCQ▾

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: 433

» Statistical Methods » Skewness and Kurtosis

MCQ▾

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

Question number: 434

» Statistical Methods » Dispersion

MCQ▾

Question

Which of the following relationship holds between mean deviation (M. D. ) from the mean and the standard deviation (S. D. ) of any discrete distribution?

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 = 1 (always)

Question number: 435

» Statistical Methods » Skewness and Kurtosis

MCQ▾

Question

Which of the following statement is/are correct?

Choices

Choice (4) Response

a.

A distribution that is more peaked than normal is called platykurtic.

b.

A distribution identical to the normal distribution is called mesokurtic.

c.

A distribution that is less peaked than normal is called leptokurtic.

d.

All of the above

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