vey of randomly selected 8th, 10th and 12th graders from Humboldt County were asked if they used alcohol within the last 30 days. These are the results for those that responded "yes” “8th graders - 34% 10th graders -48% 12th graders-68% We want to know if the use of alcohol is the same for all students or if there is a significant difference. (a) State the null and alternative hypothesis. (hint, these should be in terms of proportions) (b) The data in the table are reported in percentages, what do we need to know in order to be able to conduct the statistical test? (c) Assume that the results are based on a simple random sample of 100 students from each grade for a total of 300 students surveyed. Perform the appropriate statistical test and
A survey of randomly selected 8th, 10th and 12th graders from Humboldt County were asked if they used alcohol within the last 30 days. These are the results for those that responded "yes”
“8th graders - 34%
10th graders -48%
12th graders-68%
We want to know if the use of alcohol is the same for all students or if there is a significant difference.
(a) State the null and alternative hypothesis. (hint, these should be in terms of proportions)
(b) The data in the table are reported in percentages, what do we need to know in order to be able to conduct the statistical test?
(c) Assume that the results are based on a simple random sample of 100 students from each grade for a total of 300 students surveyed. Perform the appropriate statistical test and report the test statistic and the p value
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