The Sampling Method
The original sampling method we chose was by survey. Surveys were labeled with a post it note and sent out through the teacher mailboxes for lunch study hall monitors to have them send out and collect the surveys and return them to us. This style that we used was a double blinded observational study. Our population of interest was all students who attended their lunch study hall and who watched the announcements. Our sample size was 24. Our sample was also mostly normal. However, we did have two outliers, both at ten minutes of watching.
Significance test
1 Mu= the true mean of watch time of the video announcements at NOHS during lunch study halls.
2 Null Hypothesis: mu= 3 minutes
3 Alternate Hypothesis: Mu is greater than 3 minutes.
4 Level of significance: 0.05
5 Test statistic used, where Mu stands for 3.0.
6 Assumptions:
1. Sample is randomly selected, YES
2. n=24 < 30. However for the sake of this study, we wil assume that the population is normally distributed. YES
7 t= 1.42 at DF=23
8 p-value= 0.915
9 Conclusion: We fail to reject the null hypothesis at any resonable level of significance because our p-value is greater than 0.01, 0.05, or 0.10.
