STAT 2507 Study Guide - Midterm Guide: Redone, Standard Deviation, Texas Instruments
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Note: there was a numerical error in question#2 (every- Notes: the formula sheet and the normal table are attached, there are 20 multiple-choice questions in this test, for each question, circle one answer only, each question has 1. 25 marks. You are told that the equation of the least-squares regression line for pre- dicting y from x, based on n = 10 pairs of observations is y = 1. 73 2x. Suppose that in a particular city, airport a handles 40% of all airline tra c, and airports b and c handle 40% and 20%, respectively. The detection rates for weapons at the three airports are 0. 9, 0. 5, and 0. 4, respectively. The following data represent a sample of 10 scores on a statistics quiz: After the mean, median, range and variance were calculated for the scores, it was discov- ered that one of the three 25"s should have been a 23.
