Based on the data above. Researchers were interested in examining if there was a significant difference in blood pressure before and after the treatment for only the ten participants who got the new drug (Treatment = Yes). Compute the mean and standard deviation for the sample of difference scores for those who received the new drug (Treatment = Yes). Round to two decimal points. MEAN = STANDARD DEVIATION = Do the results in Question 17 indicate a significant difference between blood pressure before and blood pressure after treatment? Use a two-tailed test with α = .05. To answer this question first find the test statistic and the critical value. Test statistic = Critical value = Reject or Retain the null hypothesis? (Enter "Reject" or "Retain") For the test conducted in Question 18, compute r2 to measure the size of any effect. Indicate whether the effect size are small, medium, or large. r2 = , r2 is (Enter small, medium, or large)
The following data was collected from a clinical trial testing a new drug aimed to lower blood pressure for individuals older than age 45. Half of the 20 participants received the new drug (Treatment = Yes) and the other half of the participants received a placebo pill (Treatment = No). Their age and gender was also recorded. Please use this data for Questions 17-19 and 20-24 and note, not all the information in the table will be used for either problem, you must decide what is relevant based on what the problem is asking.
|
Subject ID |
Treatment |
Age |
Gender |
BP_Before |
BP_After |
|
D1 |
Yes |
65 |
F |
103.3 |
80.5 |
|
D2 |
Yes |
59 |
F |
93.6 |
85.9 |
|
D3 |
Yes |
60 |
M |
92 |
85.2 |
|
D4 |
Yes |
54 |
F |
93 |
87.8 |
|
D5 |
Yes |
65 |
F |
95.4 |
85.3 |
|
D6 |
Yes |
57 |
M |
109.6 |
94.2 |
|
D7 |
Yes |
69 |
M |
97.9 |
83.9 |
|
D8 |
Yes |
62 |
M |
96 |
85 |
|
D9 |
Yes |
49 |
F |
98.4 |
86.3 |
|
D10 |
Yes |
45 |
M |
98.4 |
90 |
|
C1 |
No |
63 |
F |
97.4 |
93.1 |
|
C2 |
No |
56 |
F |
97.2 |
92.4 |
|
C3 |
No |
54 |
M |
98.8 |
94.6 |
|
C4 |
No |
69 |
M |
98.4 |
92.3 |
|
C5 |
No |
75 |
M |
89.8 |
89.3 |
|
C6 |
No |
62 |
F |
103.4 |
99.7 |
|
C7 |
No |
61 |
F |
90.1 |
88.4 |
|
C8 |
No |
59 |
M |
93.7 |
90.4 |
|
C9 |
No |
73 |
M |
96.4 |
91.1 |
|
C10 |
No |
57 |
F |
98.6 |
90.5 |
Based on the data above. Researchers were interested in examining if there was a significant difference in blood pressure before and after the treatment for only the ten participants who got the new drug (Treatment = Yes).
Compute the
MEAN =
STANDARD DEVIATION =
Do the results in Question 17 indicate a significant difference between blood pressure before and blood pressure after treatment? Use a two-tailed test with α = .05. To answer this question first find the test statistic and the critical value.
Test statistic =
Critical value =
Reject or Retain the null hypothesis? (Enter "Reject" or "Retain")
For the test conducted in Question 18, compute r2 to measure the size of any effect. Indicate whether the effect size are small, medium, or large.
r2 = ,
r2 is (Enter small, medium, or large)
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