This preview shows page 1. Sign up to view the full content.
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,
essentially correct on one part and partially correct on at least one other part,
partially correct on all three parts. 1 Minimal Response
Essentially correct on one part,
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
a. The population of interest is adults who used the cave and the assumptions are:
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.
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...
View Full Document