Question
In the past, the police believed that 64% of drivers stopped on Saturday nights were under the influence of alcohol. The police have started an
In the past, the police believed that 64% of drivers stopped on Saturday nights were under the influence of alcohol. The police have started an aggressive campaign to reduced the number of people who drive while under the influence of alcohol. Last Saturday night, 60 drivers were stopped and 33 of them were under the influence of alcohol. At the 5% significance level, determine if the proportion of drivers stopped on Saturday nights who were under the influence of alcohol has decreased.
- From options #1 to #4, select the correct hypotheses for this test.
- From options #5 to #8, select the correct p-value for this test.
- From options #9 to #12, select the correct conclusion for this test.
1) H0:p=64%ofdriversareundertheinfluenceofalcohol
Ha:p<64%ofdriversareundertheinfluenceofalcohol
2) H0:p=64%ofdriversareundertheinfluenceofalcohol
Ha:p>64%ofdriversareundertheinfluenceofalcohol
3) H0:p=55%ofdriversareundertheinfluenceofalcohol
Ha:p<55%ofdriversareundertheinfluenceofalcohol
4) H0:p=55%ofdriversareundertheinfluenceofalcohol
Ha:p>55%ofdriversareundertheinfluenceofalcohol
5) 0.1471
6) 0.0732
7) 0.095
8) 0.0762
9) Less than 6% of drivers under the influence of alcohol.
10) 64% of drivers under the influence of alcohol
11) Based on the sample, there is not enough evidence to conclude that the proportion of drivers stopped on Saturday nights driver under the influence of alcohol has decreased.
12) Based on the sample, there is enough evidence to conclude that the proportion of drivers on Saturday nights driving under the influence of alcohol has decreased.
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