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# computing t tests

• From Mathematics, General Mathematics
• Due on 24 Dec, 2015 05:20:00
• Asked On 24 Dec, 2015 10:20:25
• Due date has already passed, but you can still post solutions.
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Imagine you are a researcher who believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. You randomly select a sample of 20 participants from a population of mild insomnia patients and randomly assign 10 to receive visualization therapy. The other 10 participants receive no treatment.

You then measure how long (in minutes) it takes participants to fall asleep. Your data are below. The numbers represent the number of minutes each participant took to fall asleep.

No Treatment (X1)

Treatment (X2)

22

19

18

17

27

24

20

21

23

27

26

21

27

23

22

18

24

19

22

22

Assignment:

To complete this Assignment, submit by Day 7 a response to each of the following:

• Explain whether you chose to use an independent-samples t test or a matched-samples t test. Provide a rationale for your choice.
• Identify the independent and dependent variables.
• Knowing you believe the treatment will reduce the amount of time to fall asleep, state the null and alternate hypotheses in words (not formulas).
• Explain whether you would use a one-tailed or two-tailed test and why.
• Explain whether you have homogeneity of variance, and explain how you know. Explain why it is important to know if you have homogeneity of variance.
• Identify the obtained t value for this data set using SPSS.
• Identify the degrees of freedom and explain how you determined it.
• Identify the p value.
• Explain whether you should retain or reject the null hypothesis and why.
• Explain what you can conclude about the effectiveness of visualization therapy.
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## [Solved] computing t tests use as a guide only A++

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• Submitted On 25 Dec, 2015 01:35:47
Imagine you are a researcher who believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. You randomly select a sample of 20 participants from a population of mild insomnia patients and randomly assign 10 to receive visualization therapy. The other 10 participants receive no treatment. You then measure how long (in minutes) it takes participants to fall asleep. Your data are below. The numbers represent the ...
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## [Solved] computing t tests

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• Submitted On 02 Jan, 2016 03:30:21
t test Assignment complete solutions correct answers key The one-sample t test discussed in Chapter 6 requires that you know the population mean. It is unusual to have this information, so m...
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