Unit 5 - II Mat. Stat.

Unit 5 - II Mat. Stat.

University

25 Qs

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Unit 5 - II Mat. Stat.

Unit 5 - II Mat. Stat.

Assessment

Quiz

Mathematics

University

Practice Problem

Medium

Created by

sr. celestine

Used 1+ times

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25 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The t-distribution is used when:

Sample size is large

Population variance is known

Sample size is small and population variance is unknown

The data is non-numeric

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The t-distribution approaches the normal distribution as:

Degrees of freedom increase

Sample size decreases

Variance increases

Mean becomes zero

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For a t-distribution, degrees of freedom is:

n + 1

n

n - 1

2n

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For testing the difference of two means using t-test, the samples must be:

Independent

Dependent

Always equal

Large

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The formula for one-sample t-test statistic is:

t = x̅ - μ / s /√n

t = x̅ + μ

t = s / x̅

t = μ / x̅

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

In small samples, the standard deviation used is:

σ

Sample standard deviation (s)

Mean

Variance

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A paired t-test is used when:

Two groups are independent

Two groups are the same and matched

Population is known

n > 30

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