Need to see the work breakdown for this question and answer to the multiple choice after. ?
The following data were collected in a clinical trial evaluating a new compound designed to improve wound healing in trauma patients.? The new compound is compared against a placebo.? After treatment for 5 days with the new compound or placebo the extent of wound healing is measured and the data are shown below.
|
Percent Wound Healing |
||||
|
Treatment |
0-25% |
26-50% |
51-75% |
76-100% |
|
New Compound () |
15 |
37 |
32 |
41 |
|
Placebo () |
36 |
45 |
34 |
10 |
Is there a difference in the extent of wound healing by treatment?? (Hint:? Are treatment and the percent wound healing independent?)? Run the appropriate test at a 5% level of significance.
??????????????????? df= ________
?????????????? alpha= ________
?Reject H0 if ?2>________
Compute expected frequencies
Expected Frequency = (Row Total * Column Total)/N.
Complete the expected frequencies for each cell.
|
Percent Wound Healing |
Total |
||||
|
Treatment |
0-25% |
26-50% |
51-75% |
76-100% |
|
|
New Compound |
15 ( ??) |
37 ( ??) |
32 ( ??) |
41 ( ??) |
125 |
|
Placebo |
36 (? ?) |
45 ( ??) |
34 ( ??) |
10 ( ??) |
125 |
|
Total |
51 |
82 |
66 |
51 |
250 |
Compute? ?2.
???????????? ?2= ________
Based on comparing the computed ?2 to the rejection level ?2 which of the following is (are) true?
- We have statistically significant evidence at .05 to show that H0 is false.
- Treatment and percent wound healing are not independent.
- Treatment and percent wound healing are independent.
- a and b.