The results below are based on data collected on campus as part of a student project for an introductory statistics class at UF. If there is more than one group/treatment, the first group mentioned is group 1. Data was collected to compare the proportion of "Greeks" and non-"Greeks" who voted for Obama in 2012. "Greeks" are students who belong to a fraternity or sorority. The p-value was 0.00, and the 95% confidence interval was ( -0.534, -0.202). This problem is about _ two independent proportions ? _ The sign of the alternative hypothesis should be _ not = ? _ Based on the p-value we can _ reject the Ho _ at alpha = 0.05. At which alpha levels could we Reject Ho? _ all of usual alpha levels _ Are the results statistically significant at alpha=0.01? _ yes _ We have _ very strong evidence _ to say that the proportion of "Greeks" who voted for Obama is different from the proportion of non-"Greeks". We are 95% confident that the proportion of "Greeks" who voted fo
The results below are based on data collected on campus as part of a student project for an introductory statistics class at UF. If there is more than one group/treatment, the first group mentioned is group 1.
Data was collected to compare the proportion of "Greeks" and non-"Greeks" who voted for Obama in 2012. "Greeks" are students who belong to a fraternity or sorority. The p-value was 0.00, and the 95% confidence interval was ( -0.534, -0.202).
This problem is about _ two independent proportions ? _
The sign of the alternative hypothesis should be _ not = ? _
Based on the p-value we can _ reject the Ho _ at alpha = 0.05.
At which alpha levels could we Reject Ho? _ all of usual alpha levels _
Are the results statistically significant at alpha=0.01? _ yes _
We have _ very strong evidence _ to say that the proportion of "Greeks" who voted for Obama is different from the proportion of non-"Greeks".
We are 95% confident that the proportion of "Greeks" who voted for Obama was between _ 20.2% and 53.4% smaller _ than the proportion of non-"Greeks".
The results of the confidence interval and significance test at alpha=0.05 _agree_
We need to assume the sample was randomly selected because we are making inferences about _ an unknown parameter _
The population of interest is _ all UM students _
For the students collecting the data, it would be _ very difficult / fairly easy _ to select a random sample from this population.
Students collecting the data should strive for _ at least 15 successes and 15 failures per group in the sample _
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