# ISS (Statistical Services) Statistics Paper I (New 2016 MCQ Pattern): Questions 429 - 432 of 472

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## Question number: 429

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MCQ▾

### 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

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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.

8.45

b.

7.56

c.

6.33

d.

None of the above

## Question number: 431

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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: 432

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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

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