uppose a researcher is interested in evaluating the effectiveness of a new teaching method on reading comprehension. So, she randomly selects one classroom from the neighborhood school. She first administers a reading comprehension test to a group of twenty-five students and obtains a mean reading score of 135 (s = 10). She then implements the new teaching method. At the end of 10 weeks, she administers a reading comprehension test to the students again and obtains a mean score of 160 (s = 5). (1) State the null and alternative hypotheses for this study (2) What is the dependent and independent variable for this study (3) What test statistic/hypothesis test would you select to determine if the means are significantly difference at the alpha .05 level? (4) What critical value would you use to make your decision to reject or retain the null hypothesis at alpha .05?
Suppose a researcher is interested in evaluating the effectiveness of a new teaching method on reading comprehension. So, she randomly selects one classroom from the neighborhood school. She first administers a reading comprehension test to a group of twenty-five students and obtains a mean reading score of 135 (s = 10). She then implements the new teaching method. At the end of 10 weeks, she administers a reading comprehension test to the students again and obtains a mean score of 160 (s = 5). (1) State the null and alternative hypotheses for this study (2) What is the dependent and independent variable for this study (3) What test statistic/hypothesis test would you select to determine if the means are significantly difference at the alpha .05 level? (4) What critical value would you use to make your decision to reject or retain the null hypothesis at alpha .05?
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