Question 1
Exhibit 11-9
The results of a recent poll on the preference of teenagers regarding the types of music they listen to are shown below.
Music Type | Teenagers Surveyed | Teenagers Favoring
This Type |
Pop | 800 | 384 |
Rap | 900 | 450 |
Refer to Exhibit 11-9. The standard error of 
is
◦
0.48
◦
0.50
◦
0.03
◦
0.0243
Question 2
Exhibit 11-9
The results of a recent poll on the preference of teenagers regarding the types of music they listen to are shown below.
Music Type | Teenagers Surveyed | Teenagers Favoring
This Type |
Pop | 800 | 384 |
Rap | 900 | 450 |
Refer to Exhibit 11-9. The 95% confidence interval for the difference between the two proportions is
◦
384 to 450
◦
0.48 to 0.5
◦
0.028 to 0.068
◦
-0.068 to 0.028
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