Solution Found!
purpose of the study cited in Exercise 2.33 was to ask
Chapter , Problem 2.34(choose chapter or problem)
purpose of the study cited in Exercise 2.33 was to ask whether schoolchildren can estimate their own reading ability. The researchers had the childrens scores on a test of reading ability. They asked each child to estimate his or her reading level, on a scale from 1 (low) to 5 (high). Figure 2.13 is a scatterplot of the childrens estimates (response) against their reading scores (explanatory). (a) What explains the stair-step pattern in the plot? (b) Is there an overall positive association between reading score and self-estimate? (c) There is one clear outlier. What is this childs selfestimated reading level? Does this appear to over- or underestimate the level as measured by the test?
Questions & Answers
QUESTION:
purpose of the study cited in Exercise 2.33 was to ask whether schoolchildren can estimate their own reading ability. The researchers had the childrens scores on a test of reading ability. They asked each child to estimate his or her reading level, on a scale from 1 (low) to 5 (high). Figure 2.13 is a scatterplot of the childrens estimates (response) against their reading scores (explanatory). (a) What explains the stair-step pattern in the plot? (b) Is there an overall positive association between reading score and self-estimate? (c) There is one clear outlier. What is this childs selfestimated reading level? Does this appear to over- or underestimate the level as measured by the test?
ANSWER:Step 1 of 3
(a)
There is a stair-step pattern in the plot because the students can only choose from 
