https://padlet.com/anjep330/dfcwy3gmj1hb Unit 4 - Experimental Study - Probs/Stats - Fall 2017 - Allie Jeppesen and Gabriel Geselle en-us 2017-11-07 16:43:20 UTC 2024-06-10 06:28:55 UTC hello@padlet.com anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204457159 Does drinking a cup of coffee before an exam improve an individual's test scores?]]> 2017-11-07 16:53:47 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204457159 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204457817 25 students drink coffee before an exam, 25 students don't drink anything before an exam.]]> 2017-11-07 16:54:56 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204457817 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458238 6 oz. of Coffee ]]> 2017-11-07 16:55:45 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458238 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458436 Which treatment each person received with or without coffee.]]> 2017-11-07 16:56:06 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458436 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458838 At the end of the test we looked at the test scores and compared those with and without coffee.]]> 2017-11-07 16:56:50 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204458838 gabriel_geselle https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204460796 We will replicate this study with 50 new subjects, to confirm that results are are valid and significant. We will find a different group of students next time. ]]> 2017-11-07 16:59:53 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204460796 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204466382 We chose random students from a school roster. We picked 100 from Simple Random Sampling by using a random number sampler. Potential lurking variables are amount of sleep, guessing on the test, understanding of the test, and prior knowledge. ]]> 2017-11-07 17:09:38 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204466382 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467277 We got our subjects from a local high school. The parents of the students signed a waiver agreeing for them to participate in the study. ]]> 2017-11-07 17:10:55 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467277 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467552 We are not able to blind our subjects, because they will know that they are drinking coffee. Their will be no double-blind either because our group is small and they all know who is in which treatment group, since they are all in the same room. 

]]> 2017-11-07 17:11:16 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467552 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467709 Our control group is the 25 participants who will NOT have coffee before taking the test. We do not have a placebo, that is not possible for our type of experiment. ]]> 2017-11-07 17:11:33 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467709 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467877 In our study we matched our subjects up by grade level and G.P.A. We did this before the study and experiment, for one subject to get coffee before the test and one to not get any. This will help us accurately compare and evaluate our results.]]> 2017-11-07 17:11:49 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204467877 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468016 Our sample size is 100 students. Our margin of error is 10% this is a high margin of error and it is not the best because the results may not accurately describe and represent the entire population. ]]> 2017-11-07 17:12:04 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468016 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468781 We randomized all 50 participants into a group of 25 (average- 78.2%) and the randomized difference in the results was -3.56% from the group with coffee and 5.28% from the group without coffee. Therefore, the results are statistically significant because a 3.56% or 5.28% difference could not be achieved by random chance.]]> 2017-11-07 17:13:16 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468781 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468958 We've found that students that drank coffee before the exam scored higher than the students that did not drink coffee. The average test score for students that drank coffee was 81.76% and the average test score for students that did not drink coffee was 72.92%.

]]> 2017-11-07 17:13:31 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204468958 anjep330 https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204469095 Our results were published in college newspapers. Most of the participants continued to drink a small cup of coffee before an exam in order to increase their alertness level before the exam. As a result of this study, college campuses open up their coffee shops earlier on weekdays for students to purchase a cup of coffee before their exams.]]> 2017-11-07 17:13:47 UTC https://padlet.com/anjep330/dfcwy3gmj1hb/wish/204469095