/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q.32 If we leave out the low outlier,... [FREE SOLUTION] | 91影视

91影视

If we leave out the low outlier, the correlation for the remaining 13 points in the figure above is closest to

(a)0.95.(b) 0.5.

(c)0. (d) 0.5 (e)0.95.

Short Answer

Expert verified

The correlation for the remaining 13points in the figure is closest to 0.5

Correct option is (d) 0.5

Step by step solution

01

Given information

Given in the question that, We have to find the correlation for the remaining 13points in the figure below If we leave out the low outlier .

02

Explanation

The scatterplot of reading test results against IQ test scores for 14 fifth-grade pupils is shown in the diagram. We can observe from the scatterplot that the point with an IQ of 124 and a reading of 10 is an anomaly. This point deviates from the general pattern. When this outlier is removed, the remaining 13 points shift from the bottom left to the upper right. That instance, if a child has a higher test score, he or she will also have a higher reading test score. This is referred to be a positive relationship between the two variables. The connection is linear in nature. That example, the general pattern runs from bottom left to higher right in a straight line. The bond between them is moderately strong. The correlation coefficient is 0.5.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

57. Bird colonies Refer to Exercises53 and 55 . For the regression you performed earlier, r2=0.56 and s=3.67. Explain what each of these values means in this setting.

In a scatterplot of the average price of a barrel of oil and the average retail price of a gallon of gas, you expect to see.

(a) very little association.

(b) a weak negative association.

(c) a strong negative association.

(d) a weak positive association.

(e) a strong positive association.

Dem bones Archaeopteryx is an extinct beast having feathers like a bird but teeth and a long bony tail like a reptile. Only six fossil specimens are known. Because these specimens differ greatly in size, some scientists think they are different species rather than individuals from the same species. We will examine some data. If the specimens belong to the same species and differ in size because some are younger than others, there should be a positive linear relationship between the lengths of a pair of bones from all individuals. An outlier from this relationship would suggest a different species. Here are data on the lengths in centimeters of the femur (a leg bone) and the humerus (a bone in the upper arm) for the five specimens that preserve both bones:

(a) Make a scatterplot. Do you think that all five specimens come from the same species? Explain.

(b) Find the correlation r step-by-step. First, find the mean and standard deviation of each variable. Then find the six standardized values for each variable. Finally, use the formula for r. Explain how your value for rmatches your graph in (a).

Airlines have increasingly outsourced the maintenance of their planes to other companies. Critics say that the maintenance may be less carefully done so outsourcing creates a safety hazard. As evidence, they point to government data on the percent of major maintenance outsourced and the percent of flight delays blamed on the airline (often due to maintenance problems): Make a scatterplot by hand that shows how delays relate to outsourcing.

AirlineOutsource percentDelay percentAirTran6614Alaska9242American4626America West7639ATA1819Continental6920Delta4826Frontier6531Hawaiian8070JetBlue6818Northwest7643Southwest6820United7727US Airways6324

How much gas? In Exercise 4(page 158), we examined the relationship between the average monthly temperature and the amount of natural gas consumed in Joan鈥檚 midwestern home. The 铿乬ure below shows the original scatterplot with the least-squares line added. The equation of the least-squares line isy^=142519.87x

(a) Identify the slope of the line and explain what it means in this setting.

(b) Identify the y-intercept of the line. Explain why it鈥檚 risky to use this value as a prediction.

(c) Use the regression line to predict the amount of natural gas Joan will use in a month with an average temperature of 30掳贵.

See all solutions

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.