" Preview File Edit View Go Tools Window Help I. v 335 512 ASSIGN 2022 . . a: Page 3 of 5 BSS 512 ASSIG... 1.1 An extract of a study conducted about the effects of a special class designed to aid students with verbal skills is given below: Each child was given a verbal skill test twice, both before and after completing a 4-week period in the class. Let Y = score on exam at time 2 - score on exam at time 1. Hence, if the population mean u for Y is equal to O, the class has no effect, on the average. For the four children in the study, the observed values of Y are 8-5=3, 10-3=7, 5-2=3, and 7-4=3 (e.g. for the rst child, the scores were 5 on exam 1 and 8 on exam 2, so Y = 8-5=3). It is planned to test the null hypothesis of no effect against the alternative hypothesis that the effect is positive, based on the following results from a statistical software package: Variable Number of cases Mean Standard Deviation Standard Error Y 4 4.000 2.000 1.000 1.1.1 Set up the null and alternative hypotheses. (4) 1.1.2 Calculate the test statistic, and indicate whether the P-value was below 0.05, based on using the appropriate table