The table shows the number of absences, $ x $, in a class and the final exam grade, $ y $, for seven students.\[\begin{array}{|c|c|c|c|c|c|c|c|}\hlinex & 1 & 0 & 2 & 6 & 4 & 3 & 3 \\\hliney & 95 & 90 & 90 & 55 & 70 & 80 & 85 \\\hline\end{array}\]According to the coefficient of determination, $\boxed{\hspace{7em}}$ % of the variation of final exam grades is unexplained and is due to other factors.(Give answer as a percent rounded to one decimal place. Do not write the % sign.)

Formula : coefficient of determination r² =√r

Answered: The table shows the number of absences,…

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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Solve for C
Illustration 15.24. A correlation coefficient of 0.5 does not mean that 50% of the variauce is explained. Comment.
ley conducted an anonymous survey of his class, to find out how they did on the last test. He rized the results in the stem-and-leaf plot below. (5 points) If a score of 60% or higher is passing, what percentage of the students passed the test? First, write the fraction, then change to a percent. 85% Stem Leaf 10 4 5 57 55,57 60 70,70 What is the ratio of those who passed to those who did not? 7 0078 19 8 22255 6 D 9. 111455, What score(s) occurred the most often (the mode)? 91,91, What was the difference between the highest and the lowest scores (the range)?
The ages (in years) and helghts (in inches) of all pitchers for a beseball team are listed. Find the coefficient of variation for each of the two data sets. Then compare the results. -Click the Icon to view the data sets. CV. %D Round to one decimal place as needed.)
Use 4 decimal places.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 Final 78 76 77 85 68 55 71 51 85 40 52 83 46 89 94 79 85 84 26 86 61 81 71 29 98 43 86 99 89 40 70 77 Midterm 51 100 79 67 78 73 74 48 83 70 59 65 72 74 87 73 36 68 86 68 65 60 76 55 82 57 75 79 61 32 48 34
The value of a certain car when it was brand new with 0 mileage was $17,000 but the value dropped to $4,000 when the car acounulated 80,000 miles shown in the scatter plot below. Car's Mleage and Value S17.000 $2,000 Mileage Based on the data in the scatter plot, at what mileage was the car worth about $12,000? O 20,000 miles O 30,000 miles O 60,000 miles O 80,000 miles
Kahuna's Credit Union conducted a survey as to how long customers claimed to wait in the checkout line until their turn. Let X = time in line. The table below displays the ordered real data (in minutes): 0.50 4.25 5 6 7.25 1.75 4.25 5.25 6 17.25 2 4.25 5.25 6.25 7.25 2.25 4.25 5.5 6.25 7.75 2.25 45 55 65 8 2.5 4.75 55 65 825 2.75 4.75 5.75 6.5 19.5 3.25 4.75 5.75 6.75 95 3.755 16 6.75 9.75 3.75 5 6 6.75 10.75 Calculate the sample mean and the sample standard deviation to the nearest hundreths.
Complete the following statements: 1. In general,________ % of the values in a data set lie at or below the 54th percentile. 2. _______ % of the values in a data set lie above the 24th percentile.
A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 5 children and measures their height and head circumference. The data are summarized below. Complete parts (a) through (f) below. Height (inches), x Head Circumference (inches), y 27.75 27.5 25.5 26 270 17.6 17.5 17.1 17.3 17.5 (a) Treating height as the explanatory variable, x, use technology to determine the estimates of B and B4 Po z bo = (Round to four decimal places as needed.) B, xb, = (Round to four decimal places as needed.)
The ages (in years) and heights (in inches) of all pitchers for a baseball team are listed. Find the coefficient of variation for each of the two data sets. Then compare the results. E Click the icon to view the data sets. CVneights % (Round to one decimal place as needed.) Data Table CVages (Round to one decimal place as needed.) Compare the results. What can you conclude? O A. Ages are more variable than heights for all pitchers on this team. Heights Ages 76 25 O B. Ages and heights for all pitchers on this team have about the same amount of variability. 71 28 OC. Heights are more variable than ages for all pitchers on this team. 75 28 70 25 74 25 74 25 75 27 74 27 74 26 79 34 78 34 79 37 Print Done Click to select your answer(s).
It is thought that prehistoric Indians did not take their best tools, pottery, and household items when they visited higher elevations for their summer camps. It is hypothesized that archaeological sites tend to lose their cultural identity and specific cultural affiliation as the elevation of the site increases. Let x be the elevation (in thousands of feet) of an archaeological site in the southwestern United States. Let y be the percentage of unidentified artifacts (no specific cultural affiliation) at a given elevation. The following data were obtained for a collection of archaeological sites in New Mexico. x 5.23 5.89 6.25 6.75 7.25 y 18 11 33 37 62 Complete parts (a) through (e), given Σx = 31.37, Σy = 161, Σx2 = 199.2325, Σy2 = 6747, Σxy = 1064.43, and r ≈ 0.884. (b) Verify the given sums Σx, Σy, Σx2, Σy2, Σxy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) Σx = Σy = Σx2 = Σy2 = Σxy = r =…

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