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S7Exam3Review

Authored by Izzy Fleetwood

Mathematics

University

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S7Exam3Review
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does the t distribution have greater variability in the tails of the distribution compared to a normal distribution?

because the t distribution is positively skewed

because the sample variance is substituted for the population variance to estimate the standard error in this distribution

because the normal distribution is negatively skewed compared to the t distribution

it does not; the t distribution is the same as a normal distribution

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the degrees of freedom for a t distribution?

none

N

n

n-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A researcher conducts a one-sample t test with a sample of 24 participants. What are the degrees of freedom for this hypothesis test?

23

22

24

25

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A researcher conducts a one-sample t test. What are the critical values for a two-tailed hypothesis test at a .05 level of significance when df = 14?

1.761

1.771

±2.145

±2.160

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A between-subjects design is one in which:

the same participants are observed in each group

different participants are observed in each group

no participants are observed in any groups

participants are subjected to a treatment

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What types of samples are selected using the between-subjects design?

dependent samples

in-between samples

independent samples

related samples

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a way to select independent samples?

select one sample from the same population and randomly assign participants in the sample to groups

select a sample from two populations

select a sample from one population, then observe those same participants in each group

both a and b

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