AThe least-squares regression equation is y = 720.8x + 14,490 where y is the median income and x is the percentage of 25years and older with at least a bachelor's degree in the region. The scatter diagram indicates a linear relation between thetwo variables with a correlation coefficient of 0.7743. Complete parts (a) through (d).(a) Predict the median income of a region in which 20% of adults 25 years and older have at least a bachelor's degree.(Round to the nearest dollar as needed.)GMedian Income55000-20000+15 20 25 30 35 40 45 50 55 60Bachelor's %Q

The regression equation between the variables X and Y is, is the median income is the percentage…

Answered: er with at least a bachelor's degree in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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You would expect ______ between the number of hours of sleep per day and age for children between the ages of 1 and 5. a. A positive correlation b. No correlation c. A nonlinear correlation d. A negative correlation
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Which plot indicates a correlation of 0.7? A R 8 8 in 10 A
A random sample of ten professional athletes produced the following data. The first row is the number of endorsements the athlete has and the second row is the amount of money made (in millions of dollars) by the athlete.   What is the slope of the line of best fit? Round to 3 decimal places. Number of Endorsements 0 3 2 1 5 5 4 3 0 4 Profit (in Millions) 2 8 7 3 13 12 9 9 3 10
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A professor went to a website for rating professors and looked up the quality rating and also the "easiness" of the six full-time professors in one department. The ratings are 1 (lowest quality) to 5 (highest quality) and 1 (hardest) to 5 (easiest). The numbers given are averages for each professor. Assume the trend is linear, find the correlation, and comment on what it means. Calculate the correlation. r = (Round to three decimal places as needed.) Comment on the meaning of the correlation. Choose the correct interpretation below. OA. The professors that have high easiness scores tend to also have low quality scores.. OB. Being "easy" as a professor causes students to regard the professor as having a higher quality. OC. The professors that have high easiness scores tend to also have high quality scores. OD. Being "easy" as a professor causes students to regard the professor as having a lower quality. Quality Easiness D 4.7 3.7 4.7 3.1 4.2 3.5 4.2 2.6 3.9 1.9 3.5 1.8
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