Data set Martha believes that a relaxation technique involving visualization wil
ID: 3262704 • Letter: D
Question
Data set
Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selescts 10 patients from a group of mild insomnia patients and measure how long (in Minutes) it takes each one to fall asleep. Each participant is then taught the visualization technique and measure again to see how long it takes him or her to fall asleep. Her data are below.
Before treatment After Treatment
(X1) (X2)
22 19
18 17
27 24
20 21
23 27
26 21
27 23
22 18
24 19
22 22
A. What type of parametric test should she use?
B. What are the IV and DV's?
C. Is this one or two tailed?
The hypothesis are:
Ha: ud>0
d. with a=.05, what is t _______critical? (look t up based on the degrees of freedom)
The calculated t is_________obtained t obtained =2.148
How to report the results using the correct format: We found that the time to fall asleep for people without treatment (M=23.10,SD=2.961) was longer than for those with the visualization technique (M=21.10, SD=3.035, t(9)=2.148,p<.05.
e. Would it be appropriate to determine the confidence interval?
f. Would it be appropriate to calculate the effect size?
g. What should Martha conclude?
Before treatment After Treatment
(X1) (X2)
22 19
18 17
27 24
20 21
23 27
26 21
27 23
22 18
24 19
22 22
A. What type of parametric test should she use?
B. What are the IV and DV's?
C. Is this one or two tailed?
The hypothesis are:
H0: ud 0
Ha: ud>0
d. with a=.05, what is t _______critical? (look t up based on the degrees of freedom)
The calculated t is_________obtained t obtained =2.148
How to report the results using the correct format: We found that the time to fall asleep for people without treatment (M=23.10,SD=2.961) was longer than for those with the visualization technique (M=21.10, SD=3.035, t(9)=2.148,p<.05.
e. Would it be appropriate to determine the confidence interval?
f. Would it be appropriate to calculate the effect size?
g. What should Martha conclude?
Explanation / Answer
A) We will use Paired T test to test the hypothesis
B) IV is Relaxation technique and DV is the time it takes to fall asleep
c) This is one tailed test
d) with a = 0.05
Critical value = 1.833
Calculated t = 2.148
Since t is greater than 1.833, we reject the null hyothesis and conclude that relaxation technique improves time to take fall asleep
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