Exam 23: Hypothesis Testingexamples and Case Studies

Suppose you are conducting a one-sided hypothesis test for a difference in two means (using 2 independent large samples), and you have a test statistic of −2.3, which is in the direction of the alternative hypothesis.How extreme is this value and what is your conclusion for this test?

For Questions , use the following narrative Narrative: Math pass "Higher math exam pass rates were observed in the group who got 10 hours of tutoring per week compared to those who didn't (87% versus 77%) (p<.05)." -{Math pass narrative} Explain what these results mean in terms a non-statistics student would understand.

If the null and alternative hypotheses can be expressed in terms of a population proportion or mean, and if the sample sizes are large, then the test statistic is simply the _______________ associated with the sample proportion or sample mean (assuming the null hypothesis is true).

Even when information in a news article is sparse, you can sometimes piece the information together to figure out certain parts of the hypothesis test on your own.What piece of information is not possible to figure out unless it is given to you?

Journal articles very often report the p-value for their results, rather than just stating their conclusions as to whether or not they found a statistically significant result.Explain why this is important to you as an educated consumer of statistical information.