Scatter plots and Equations of Lines, Writing an Equation for a trend line Which graph shows the best trend line for the following data Practice (weeks) 6 8 10 12 14 16 18 Score 15.5 21.5 26.5 34 33 37 41

Scatter plots and Equations of Lines, Writing an Equation for a trend line Which graph shows the best trend line for the following data Practice (weeks) 6 8 10 12 14 16 18 Score 15.5 21.5 26.5 34 33 37 41

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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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
Would it be OK to use the line to predict the age of the wife if the husband is 80 years old? Explain your answer.
The ordered pairs below give the winning times (in seconds) of a 100-meter freestyle swim race at a regularly-held competition from 1984 through 2012. (1984, 54.22) (2000, 52.13) (1988, 53.23) (2004, 52.14) (1992, 52.94) (2008, 51.42) (1996, 52.80) (2012, 51.30) (a) Sketch a scatter plot of the data. Let y represent the winning time (in seconds) and let t = 84 represent 1984. (b) Sketch the line that you think best approximates the data and find an equation of the line. (Round the slope and y-intercept to one decimal place.) y = (c) Use the regression feature of a graphing utility to find the equation of the least squares regression line that fits the data. (Round the slope and y-intercept to two decimal places.) y =
The table shows the number of hours you studied before your eight math tests and your percent score on cach test.. write the equation of a trend line.
Gradeboo t Content The data to the right shows the number of graduating students with business majors at a university over the last 15 275 269 263 257 Scor years. 249 242 236 231 1009 a Construct a box-and-whisker plot for this data. b. Identify the five-number summary. 223 216 210 204 y Plan 199 193 187 o & Resou 91.33% ary a) Choose the correct box-and-whisker plot of the data below. O B. OC. essible Res O A. 94.85% -chase Opti past due 250 300 mmunicati 150 200 150 200 250 300 150 200 250 300 b) The five-number summary is (Use ascending order.)
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Plot the scatterplots and predicted trendlines. Observe the role and effects of SCALE,R Square,slope, p-value. " Normal babies" patient set apgar score d1 apgar score d2 1 1 1.1 2 2 2.2 3 3 3.3 4 4 4.4 5 5 5.5 6 6 6.6 7 7 7.7 8 8 8.8 9 9 9.9
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+ Automatic Zoom Weight (tons) 70 60 50 40 30 ROSA200 16, 17, 10 20 40 60 80 100 Length (feet) X4 Which statement accurately describes the information in the scatter plot? A. The information shows a positive correlation. The weight of a dinosaur tends to increase according to its length. B. The information shows a negative correlation. The weight of a dinosaur tends to decrease according to its length. C. The information shows no correlation. The weight and length vary according to the type of dinosaur. D. The information shows no correlation. The relationship between the weight and length of a dinosaur is uncertain. Book Page 182-183