There are three hospitals in the Tulsa, Oklahoma, area. The following data show the num- ber of outpatient surgeries performed at each hospital last week. At the .05 significance level, can we conclude there is a difference in the mean number of surgeries performed by hospital or by day of the week.
|
Day
|
St. Luke's
|
St. Vincent
|
Mercy
|
|
Monday
|
14
|
18
|
24
|
|
Tuesday
|
20
|
24
|
14
|
|
Wednesday
|
16
|
22
|
14
|
|
Thursday
|
18
|
20
|
22
|
|
Friday
|
20
|
28
|
24
|
19. Consider the following sample data for a two-factor ANOVA experiment:
|
|
Size
|
|
|
Small
|
Medium
|
Large
|
|
23
|
20
|
11
|
|
Heavy
|
21
|
32
|
20
|
|
|
25
|
26
|
20
|
|
Weight
|
|
|
|
|
|
|
13
|
20
|
11
|
|
Light
|
32
|
17
|
23
|
|
|
17
|
15
|
8
|
Use the .05 significance level to answer the following questions.
a. Is there a difference in the Size means?
b. Is there a difference in the Weight means?
c. Is there a significant interaction between Weight and Size?