Montarello and Martins (2005) found that fifth grade studentscompleted more mathematics problems correctly when simple problemswere mixed in with their regular math assignments. To furtherexplore this phenomenon, suppose that a researcher selects astandardized mathematics achievement test that produces a normaldistribution of scores with a mean of µ= 100 and a standarddeviation of ? = 18. The researcher modifies the test by insertinga set of very easy problems among the standardized questions andgives the modified test to a sample of n = 36 students. Ifthe average test score for the sample is M = 104, is thisresult sufficient to conclude that inserting the easy questionsimproves student performance? Use a one-tailed test with ?= .01.
A)The alternative hypotheses in words is
B)The null hypothesis in symbols is
C)The critical z values is
D)The z-score statistic is:
E) Your decision is
