(c) Find the linear correlation coefficient. Round your answer to 4 decimals.r =(d) Comment on whether a linear model is a good model. Explain why. This part will be hand graded.(e) Predict the breaking distance if you were going 65 miles per hour. Use your rounded values from part(b). Round your final answer to one decimal.feet(f) What speed would you be traveling at if you needed 200 feet to break? Use your rounded values frompart (b). Round your final answer to two decimals.mph The following data represent the speed of a car (in miles per hour) and its breaking distance (in feet) ondry asphalt.SpeedBreaking Distance30405060708065.489.9104.2 128.3140.4167.6(a) Draw a scatter plot.180-150-120-90-60-30-1010 2030 4050607080 90Clear All Draw: Dot(b) Find the least squares regresssion line. Round the slope and y-intercept to two decimals.B(x) =

Answered: (c) Find the linear correlation…

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 survey is conducted on 700 Californians older than 30 years of age. The study wants to obtain inference on the relationship between years of education and yearly income in dollars. The response variable is income in dollars and the explanatory variable is years of education. A simple linear regression model is fit, and the output from R is below: Im(formula = Income Coefficients: ~ Education, data = CA) Estimate Std. Error t value Pr(>|t|) (Intercept) 25200.25 1488.94 16.93 3.08e-10 Education 2905.35 112.61 25.80 1.49e-12 *** *** Residual standard error: 32400 on 698 degrees of freedom Multiple R-squared: 0.7602
The scatter plot and line of best fit below show the length of 11 people’s femur and their height in centimeters what is the meaning of the x-value on the line when y = 150
Sarah was given a gift card for a coffee shop. Each morning, Sarah uses the card to buy one cup of coffee. Let A represent the amount money remaining on the card after buying a cups of coffee. The table below has select values showing the linear relationship between x and A. Determine the original amount of money on the gift card. X 4 10 15 A 30.00 15.00 2.50 www
The table and scatter plot show the time spent texting, x, and the time spent exercising, y, by each of 9 students last week. The equation of the line of best fit is y =-0.4x+6.99. Time spent Time spent 11+y texting, x exercising, y (in hours) 10 (in hours) 1.9 6.54 Time spent 2.2 5.48 exercising 2.8 6.94 (in hours) 3.5 5.16 4.1 4.50 4.6 4.30 4.9 6.50 5.5 3.36 Time spent texting 5.6 5.97 (in hours) Use the equation of the line of best fit to fill in the blanks below. Give exact answers, not rounded approximations. Observed time spent exercising (in hours) Predicted time spent exercising (in hours) Residual Time spent texting (in hours) (in hours) 4.1 4.9
Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient of x should be positive or negative. O A. linear, negative O B. quadratic; negative O C. quadratic; positive O D. linear; positive 3- 2- -5 43 2 2. 3 4 5 20 -4-
H. Use the model to predict sales when the business spends $885 ($'000) in the advertisement. Does the model underestimate or overestimate sales? G. What is the value of the coefficient of determination, R2? What does R2 tell us about explained variation in y? (Refer to Coefficient of Determination LO 12-4). H. Use the model to predict sales when the business spends $885 ($'000) in the advertisement. Does the model underestimate or overestimate sales?
Imagine you score a x=54 on an exam. What set of parameters would give you the highest grade? A: ?= 52 and ?=2 B: ?= 50 and ?=8 C: ?= 50 ?=2 D: ?=52 and ?=8
snow Which equation represents the line of best fit for the scatter plot below? 6. Age vs. Leg Length 80 75 70 65 60 55 50 45 40 35 30 4 6. 10 12 14 Age (years) A. y = 3 x B. y = 3 x + 35 %3D С. у %3D 48х D. y = 48x + 48 Leg Length (cm)
What does it mean if r=0? Choose the correct answer below. O A. A relationship does exist between the varjables O B. No relationship exists between the variables O C. A linear relationship does exist between the variables, O D. No linear relationship exists between the variables. Click to select your answer. I 9:2 acer 女 esc @ # $ % & * 1 2 3 4. 5 7 8 tab e y a S d g h k t.
Determine which score corresponds to the higher relative position.Which score has a higher relative position, a score of 70.8 on a test for which x̅ = 65 and s = 6, or a score of 261.6 on a test for which x̅ = 240 and s = 21?
In an area of the Great Plains, records were kept on the relationship between the rainfall (in inches) and the yield of wheat (bushes per acre). Calculate the linear coefficient. Rainfall (in inches), x 9.4 7.7 12.3 11.4 17.7 9.2 5.9 14.5 14.9 Yield (bushels per acre), y 46.5 42.2 54.8 55 78.4 45.2 27.9 72 74.8 Answer choices are: A. 0.900 B. 0.981 C. 0.899 D. 0.998

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