Chapter 8 - independent/paired sample t tests

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8 Terms

1
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When is an independent t-test used?

Used when we want to compare one sample to another sample; between-subject research design

2
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What is the independent t-test formula?

The difference between the means for sample 1 and sample 2 divided by the pooled variability that exists in sample 1 and sample 2

<p><span><span>The difference between the means for sample 1 and sample 2 divided by the pooled variability that exists in sample 1 and sample 2</span></span></p>
3
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What is the null hypothesis for an independent t-test?

States that the means of the two groups are statistically the same

4
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When is a paired-sample t-test used?

When comparing one sample at time 1 to same sample at time 2

5
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What is the paired-sample t-test formula?

The amount of difference between each pair, added together divided by the amount of variability that exists across sum of differences

<p>The amount of difference between each pair, added together divided by the amount of variability that exists across sum of differences</p>
6
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What is the null hypothesis of a paired-sample t-test?

There will be no difference at t1 and t2

7
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What is the df for an independent t-test?

n-1

8
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What is the df for a paired sample t-test?

n-1