Question

A teacher decided to test the effect of sound when students were studying Students in de were randomly assigned into three groups of eight. All groups where when the same material and 30 minutes to study prior to being given a quiz. One group was exposed to consistent background music, one group was exposed to a soundtrack of minor construction work where the volume fluctuated and the third group was left in quiet to study. The teacher believes a constant background music is best to study by. Is there evidence at the 0.05 significance level, to suggest the teachers correct? Music 71 79 Inconsistent 54 65 Quiet 69 75 71 58 88 98 69 50 77 91 86 79 84 62 71 65 81 75 80 82 No. A p-value of 0.056 is larger than the typical alpha of 0.05 so we will fail to reject the null hypothesis and conclude there is not a statistical difference between the three groups. Yes. The Kruskal-Wallis p-value is 0.0112 indicating at least one of the groups is different. A quick inspection of the summary statistics indicates the music group has the largest mean and median. No. The Kruskal-Wallis p-value is 0.0112 so we will fail to reject the null hypothesis and conclude there is not a statistical difference between the three groups. Yes. The ANOVA p-value is 0.0056 indicating at least one of the groups is different. Fisher's LSD indicates the Music group has hgher average than the Quiet and inconsistent groups.

Answer 1

A teacher decided to test the effect of sound when students were studying Students in de were randomly assigned into three groups of eight. All groups where when the same material and 30 minutes to study prior to being given a quiz. One group was exposed to consistent background music, one group was exposed to a soundtrack of minor construction work where the volume fluctuated and the third group was left in quiet to study. The teacher believes a constant background music is best to study by. Is there evidence at the 0.05 significance level, to suggest the teachers correct? Music 71 79 Inconsistent 54 65 Quiet 69 75 71 58 88 98 69 50 77 91 86 79 84 62 71 65 81 75 80 82 No. A p-value of 0.056 is larger than the typical alpha of 0.05 so we will fail to reject the null hypothesis and conclude there is not a statistical difference between the three groups. Yes. The Kruskal-Wallis p-value is 0.0112 indicating at least one of the groups is different. A quick inspection of the summary statistics indicates the music group has the largest mean and median. No. The Kruskal-Wallis p-value is 0.0112 so we will fail to reject the null hypothesis and conclude there is not a statistical difference between the three groups. Yes. The ANOVA p-value is 0.0056 indicating at least one of the groups is different. Fisher's LSD indicates the Music group has hgher average than the Quiet and inconsistent groups.