STAT 1450 Study Guide - Final Guide: Nasal Spray, Confidence Interval, Dependent And Independent Variables
9 Oct 2018
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Note: this review is longer than a final exam would be, but the questions are representative of the types of questions you could see. There are no guarantees that the final exam looks like the final exam review. It also reports a correlation of -0. 8 between math achievement and a math anxiety test for the same group of students. Only students with scores on all three measures were included in the study. The mean and standard deviation were computed; the standard deviation was 0. The scatterplot tells us, however, that when x is below its mean, y tends to be above its mean, and when x is above its mean, y tends to be below its mean. What is the sign on the correlation coefficient in this case: positive, negative, zero, no way to tell. The resulting confidence interval is 42% to 48%.
