We introduced a special test-taking strategy to 16 individuals. those individuals have an average test score of 80. we know that the test scores of people who use the strategy are normally distributed with a standard deviation of 12. we also know that among test takers who do not use the strategy, the average test score is 72.5. The null hypothesis for the study is that the test takers who use the special strategy performed the same on average as those who don't. report the z test value for the study. consult the z-score table and report to the probability of randomly observing a set of observations this extreme if the null hypothesis was true. A. 2.5; .0062
B. 1.8; .0359
C. 2; .0228
D. 2.5; .0179
E. 1.8 ; .0359
F. 2; .0179