A study has been carried out to compare the United Way contributions made by clerical workers from three local corporations. A sample of clerical workers has been randomly selected from each firm, and the dollar amounts of their contributions are as follows.
|
Firm 1
|
Firm 2
|
Firm 3
|
|
199
|
108
|
162
|
|
236
|
104
|
86
|
|
167
|
153
|
160
|
|
263
|
218
|
135
|
|
254
|
210
|
207
|
|
|
96
|
201
|
a. What are the null and alternative hypotheses for this test?
b. Use ANOVA and the 0.05 level of significance in testing the null hypothesis identified in part (a).