PLEASE USE GEOGEBRA

also a) Ha is higher than 0.05

b) use calculation to support your answer rather than explanations. In other words, Convert the given information of rap, into a hypothesis (like H0 or Ha) and then compare this hypothesis with the conclusion you got from 4a. Can this hypothesis be true? So, the hypothesis from b) will be similar to one hypothesis from a). You just have to find if it is Ha or H0 from a) that will satisfy the information about rap given in b).

[7] 4. A statistics instructor uses their free time to compose a \"Condence Interval Rap\". The instructor believes this educational rap will help students to study and understand statis- tics. To test the effectiveness of this rap as a study aid, the instructor divides a class of statistics students into two groups, assigning each student to one of the two groups at random. Group A studies for a pop quiz while the \" Condence Interval Rap\" is played on repeat using the class sound system, while group B studies for the pop quiz in silence. Both groups then write the pop quiz in silence, and their grade performance is compared. [3] (a) Use a independent samples ttest to compare the performance of the true groups, using the alternative hypothesis that the rap group should do better. Use a signif- icance threshold of oz = 0.05. State all relevant hypotheses (in symbols) and test statistics / distributions, as well as the pvalue and appropriate conclusion of the test. Sample Statistics: "RAP = 15; ERAP = 55; SRAP = 5 "QUIET = 15, {TEQUIET = 70, SQUIET = 4 (b) Based on the results of the experiment, the instructor concludes, with obvious dis- appointment, that there seems to be insufficient evidence to doubt the claim that the rap has no effect on study effectiveness. Do you think this is an appropriate conclu sion for the study? Discuss other possible interpretations of the sample data