Learning Materials
Features
Discover
Chapter 3: Q 75. (page 197)
Measurements on young children in Mumbai, India, found this least-squares line for predicting height from the arm span Measurements are in centimeters (cm).
According to the regression line, the predicted height of a child with an arm span of 100 cm is about
The correct option is (b)
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
Penguins diving A study of king penguins looked for a relationship between how deep the penguins dive to seek food and how long they stay underwater. For all but the shallowest dives, there is a linear relationship that is different for different penguins. The study gives a scatterplot for
one penguin titled 鈥淭he Relation of Dive Duration to Depth 鈥� Duration y is measured in minutes and depth x is in meters. The report then says, 鈥淭he regression equation for this bird is:
(a) What is the slope of the regression line? Explain in specific language what this value says about this penguin鈥檚 dives.
(b) According to the regression line, how long does a typical dive to a depth of meters last?
(c) Does the intercept of the regression line make any sense? If so, interpret it. If not, explain why not.
The graph at the top right plots the gas mileage (miles per gallon) of various cars from the same model year versus the weight of these cars in thousands of pounds. The points marked with red dots correspond to cars made in Japan. From this plot, we may conclude that
(a) there is a positive association between weight and gas mileage for Japanese cars.
(b) the correlation between weight and gas mileage for all the cars is close to .
(c) there is little difference between Japanese cars and cars made in other countries.
(d) Japanese cars tend to be lighter in weight than other cars.
(e) Japanese cars tend to get worse gas mileage than other cars.
55. Bird colonies Refer to Exercise .
(a) Use your calculator to make a residual plot. Describe what this graph tells you about how well the line fits the data.
(b) Which point has the largest residual? Explain what this residual means in context.
Predict the rat鈥檚 weight after weeks. Show your work
How much gas? Refer to Exercise . During March, the average temperature was 掳F and Joan used cubic feet of gas per day. Find and interpret the residual for this month.
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