STAT 1450 Study Guide - Midterm Guide: Unimodality, Braking Distance
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Stat 145 midterm review answers: describe the w"s, if the information is given: What: brand, price, transmission, fuel economy, acceleration, braking distance, reliability. Why: information for potential consumers are boys; are girls: strictly speaking, mode of transportation and gender are not independent, since 54. 26% of the students are girls, but 53. 13% of the bus riders are girls. So, outliers are any fish weighing less than. Q1 1. 5iqr = 2. 8 1. 5(0. 5) = 2. 8 0. 75 = 2. 05 pounds and any fish weighing more than q3 + 1. 5iqr = 3. 3 + 1. 5(0. 5) = 3. 3 + 0. 75 = 4. 05 pounds. The fish weighing 4. 2 pounds is an outlier: the mean and sd are appropriate for distributions that are unimodal and roughly symmetric. Since this distribution is at least bimodal, the mean and sd are not appropriate. 340. 180918. 09%188 340. 333333. 33%102 340. 531353. 13%64 860. 4574188 1020. 5426188 6: this was an observational study, and observational studies cannot prove causation. Treatment 1 (play computer games) compare aggressiveness at school.
