Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The other 10 participants receive no treatment. Each participant then is measured how long (in minutes) it takes him or her to fall asleep. 2. Data: No Visualization treatment Treatment 22 19 18 17 27 24 20 21 23 27 26 21 22 23 24 18 27 19 22 22 a) Should you use an independent samples t-test or a related samples t-test? Explain your answer. b) Describe how Martha could have approached her question differently by using the design opposite to your answer in Q1. That is, if this is an independent samples design, how would The rest of the question is at the bottom with letter (C) Martha revise her study to do a related samples design? Or... if this is a related samples design, how would she revise the method to do an independent samples design? c) State the Ho and H3.

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Martha believes that a relaxation technique involving visualization will help people with mild
insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild
insomnia patients and randomly assigns 10 to receive visualization therapy. The other 10 participants
2.
receive no treatment. Each participant then is measured how long (in minutes) it takes him or her to
fall asleep.
Data:
No
Visualization
treatment
Treatment
22
19
18
17
27
24
20
21
23
27
26
21
22
23
24
18
27
19
22
22
a) Should you use an independent samples t-test or a related samples t-test? Explain your answer.
b) Describe how Martha could have approached her question differently by using the design
opposite to your answer in Q1. That is, if this is an independent samples design, how would
The rest of the
question is at the
bottom with letter (C)
Martha revise her study to do a related samples design? Or.. if this is a related samples design,
how would she revise the method to do an independent samples design?
c) State the Ho and Ha.
Transcribed Image Text:Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The other 10 participants 2. receive no treatment. Each participant then is measured how long (in minutes) it takes him or her to fall asleep. Data: No Visualization treatment Treatment 22 19 18 17 27 24 20 21 23 27 26 21 22 23 24 18 27 19 22 22 a) Should you use an independent samples t-test or a related samples t-test? Explain your answer. b) Describe how Martha could have approached her question differently by using the design opposite to your answer in Q1. That is, if this is an independent samples design, how would The rest of the question is at the bottom with letter (C) Martha revise her study to do a related samples design? Or.. if this is a related samples design, how would she revise the method to do an independent samples design? c) State the Ho and Ha.
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d) Using α=.05, what is tcrit?
e) Given pooled variance = 8.99, Calculate tobt.
f) What should Martha conclude?

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