G because 330 is the lowest strength at which drug b

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Unformatted text preview: f dosage (e.g. because 330 is the lowest strength at which drug B gives at least 50% relief.) 4 Complete Response Essentially correct on all three parts. 3 Substantial Response Essentially correct on two parts and partially correct on the other part. 2 Developing Response Essentially correct on two parts and incorrect on the other part, OR essentially correct on one part and partially correct on at least one other part, OR partially correct on all three parts. 1 Minimal Response Essentially correct on one part, OR partially correct on two parts. 0 No credit Copyright © 2000 College Entrance Examination Board and Educational Testing Service. All rights reserved. AP is a registered trademark of the College Entrance Examination Board. AP® Statistics 2000 ─ Scoring Guidelines Question 2 Solution a. The population of interest is adults who used the cave and the assumptions are: 1. 2. b. the 20 measurements constitute a random sample from the population of adults who used the cave. the adult foot length distribution is normal or approximately normal. (Some may state this assumption as “the population distribution is normal or the sample from the population is large (e.g., n >30).” This is acceptable.) Random sample is not reasonable: This sample was not taken from the population of interest since the anthropologists took a random sample of footprints, not a random sample of adults who used the cave. There may be several different ways to explain that the sample was not taken from the population of interest. For example: • the 20 observations may include several footprints from the same adult • the footprints may be from children • some of the original footprints may have eroded in time Normality: Either of the responses below is acceptable. Normality is not reasonable: 1. A boxplot or an analysis of the given summary statistics can be used to show that the distribution is skewed. OR 2. The range of the data is 21.8, which is only 2.91 standard deviations, which is smaller than would be expected for a...
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This note was uploaded on 09/06/2013 for the course MATH AP Statist taught by Professor Mosby during the Spring '13 term at Silverton High School, Silverton.

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