Learning Materials
Features
Discover
Chapter 1: Q 99. (page 76)
Foot lengths Here are the foot lengths (in centimeters) for a random sample of seven 14-year-olds from the United Kingdom:
Calculate the standard deviation. Interpret this value.
The standard deviation is 2.5166 cm.
Over 30 million students worldwide already upgrade their learning with 91影视!
All the tools & learning materials you need for study success - in one app.
Get started for free
Support the court? A news network reported the results of a survey about a controversial court decision. The network initially posted on its website a bar graph of the data similar to the one that follows. Explain how this graph is misleading. (Note: When notified about the misleading nature of its graph, the network posted a corrected version.)
DRP test scores There are many ways to measure the reading ability of children. One frequently used test is the Degree of Reading Power (DRP). In a research study on third grade students, the DRP was administered to 44 students. Their scores were as follows.
Make a histogram to display the data. Write a few sentences describing the distribution of DRP scores.
Far from home A survey asked first-year college students, 鈥淗ow many miles is this college from your permanent home?鈥� Students had to choose from the following options: 5 or fewer, 6 to 10, 11 to 50, 51 to 100, 101 to 500, or more than 500. The side-by-side bar graph shows the percentage of students at public and private 4-year colleges who chose each option. Write a few sentences comparing the distributions of distance from home for students from private and public 4-year colleges who completed the survey.
Birth months Imagine asking a random sample of 60 students from your school about their birth months. Draw a plausible (believable) graph of the distribution of birth months. Should you use a bar graph or a histogram to display the data?
When comparing two distributions, it would be best to use relative frequency histograms rather than frequency histograms when
a. the distributions have different shapes.
b. the distributions have different amounts of variability.
c. the distributions have different centers.
d. the distributions have different numbers of observations.
e. at least one of the distributions has outliers
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Flashcards 
91影视 AI 
Notes 
Study Plans 
Study Sets 
Find a degree 
Magazine