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1. In an attempt to measure the emotional effect of a proposed billboard ad, an advertising agency checks the pulse rate of 10 persons before and after they are shown a photograph of the billboard. The agency believes that an effective billboard will increase the pulse rate of those who view it. In its test, the agency found the mean change in pulse rate was 15.7 beats per minute, with a standard deviation of 1.6. Using the 0.01 level of sig- nificance, examine whether the billboard stimulus could meet the agency's criterion for effectiveness.
2. The students in an aerobics class have been weighed both before and after the 5-week class, with the following results:
Person Number
Weight Before
Weight After
1
198 lb
194 lb
2
154
151
3
124
126
4
110
104
5
127
123
6
162
155
7
141
129
8
180
165
Using the 0.05 level of significance, evaluate the effectiveness of the program. Using the appropriate statistical table, what is the most accurate statement we can make about the p-value for this test?
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The Texas Transportation Institute at Texas A&M University conducted a survey to determine the # of hours per year drivers waste sitting in traffic.
a certain colege has 490 of the 584 freshman return as sophomores. does this college have a right to brag that it has
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in a winter of an epidemic flu 2000 babies were surveyed by a well-known pharmaceutical company to determine if the
The file "flowers.csv" contains information on measurements of the iris flowers. The file can be found here: flowers.csv. Create an R data frame by the name "flower.data" that contains the data in the file.
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