MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Chapter 5, Problem 2P
Use the plot command to plot the
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Suppose an experiment was conducted to compare the mileage(km) per litre
obtained by competing brands of petrol I,II,III. Three new Mazda, three new
Toyota and three new Nissan cars were available for experimentation. During the
experiment the cars would operate under same conditions in order to eliminate
the effect of external variables on the distance travelled per litre on the assigned
brand of petrol. The data is given as below:
Brands of Petrol Mazda Toyota Nissan
I 10.6 12.0 11.0
II 9.0 15.0 12.0
III 12.0 17.4 13.0
(a) Test at the 5% level of significance whether there are signi
cant differences among the brands of fuels and also among the cars. [10]
(b) Compute the standard error for comparing any two fuel brands means. Hence
compare, at the 5% level of significance, each of fuel brands II, and III with
the standard fuel brand I. [10]
Business discuss
What would you say about a set of quantitative bivariate data whose linear correlation is -1? What would a scatter diagram of the data look like? (5 points)
Chapter 5 Solutions
MATLAB: An Introduction with Applications
Ch. 5 - Prob. 1PCh. 5 - Use the plot command to plot the function...Ch. 5 - Use the plot command to plot the function...Ch. 5 - Plot the function (x)=x2exand its derivative for...Ch. 5 - Make two separate plots of the function...Ch. 5 - Use the fplot command to plot the funtion...Ch. 5 - Plot the function f(x) = sin(2x) cos2(0.5x) and...Ch. 5 - The orbit of the planet Mercury around the sun can...Ch. 5 - Prob. 9PCh. 5 - The butterfly curve (Fay. T. H. “The Butterfly...
Ch. 5 - A plot of an astroid is shown in the figure on the...Ch. 5 - Make the plot of the astroid that is shown in the...Ch. 5 - Plot the function f(x)=x26x+7x38 in the domain 0x4...Ch. 5 - Plot the function f(x)=x+1x21 for 4x4 . Notice...Ch. 5 - Prob. 15PCh. 5 - The shape of the pretzel shown is given by the...Ch. 5 - Prob. 17PCh. 5 - Make a polar of the function: =n135.7 r=n for n=1,...Ch. 5 - Prob. 19PCh. 5 - Plot two ellipses is one figure (shown). The...Ch. 5 - The following data gives the height (in inches) of...Ch. 5 - The volage Vc t second after closing the switch in...Ch. 5 - The force F (in N) acting between a particle with...Ch. 5 - The curvilinear motion of a particle is defined by...Ch. 5 - The height and speed of a projectile shoot at a...Ch. 5 - The position x as a function of time of a particle...Ch. 5 - According to Planck’s law of black- body...Ch. 5 - A high-pass filter passes signals with frequencies...Ch. 5 - A resistor, R = 4O, and an inductor, L = 1.3 H,...Ch. 5 - In a typical tension test a dog-bone shaped...Ch. 5 - According to special relativity, a rod of length L...Ch. 5 - A railroad bumper is designed to slow down a...Ch. 5 - The ideal gas equation states that PVRT=n, where P...Ch. 5 - Two sound waves of slightly different frequencies...Ch. 5 - Consider the diode circuit shown in the figure....Ch. 5 - A monochromatic light that passes through a double...Ch. 5 - A simply supported beam is loaded as shown. The...Ch. 5 - Biological oxygen demand (BOD) is a measure of the...Ch. 5 - The shape of a asymmetric four-digitseries NACA...Ch. 5 - The Taylor series expansion for sin2x is:...
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- Analyze the residuals of a linear regression model and select the best response.Criteria is simple evaluation of possible indications of an exponential model vs. linear model) no, the residual plot does not show a curve yes, the residual plot does not show a curve yes, the residual plot shows a curve no, the residual plot shows a curve I selected: yes, the residual plot shows a curve and it is INCORRECT. Can u help me understand why?arrow_forwardYou have been hired as an intern to run analyses on the data and report the results back to Sarah; the five questions that Sarah needs you to address are given below. please do it step by step on excel Does there appear to be a positive or negative relationship between price and screen size? Use a scatter plot to examine the relationship. Determine and interpret the correlation coefficient between the two variables. In your interpretation, discuss the direction of the relationship (positive, negative, or zero relationship). Also discuss the strength of the relationship. Estimate the relationship between screen size and price using a simple linear regression model and interpret the estimated coefficients. (In your interpretation, tell the dollar amount by which price will change for each unit of increase in screen size). Include the manufacturer dummy variable (Samsung=1, 0 otherwise) and estimate the relationship between screen size, price and manufacturer dummy as a multiple…arrow_forwardHere is data with as the response variable. x y54.4 19.124.9 99.334.5 9.476.6 0.359.4 4.554.4 0.139.2 56.354 15.773.8 9-156.1 319.2Make a scatter plot of this data. Which point is an outlier? Enter as an ordered pair, e.g., (x,y). (x,y)= Find the regression equation for the data set without the outlier. Enter the equation of the form mx+b rounded to three decimal places. y_wo= Find the regression equation for the data set with the outlier. Enter the equation of the form mx+b rounded to three decimal places. y_w=arrow_forward
- You have been hired as an intern to run analyses on the data and report the results back to Sarah; the five questions that Sarah needs you to address are given below. please do it step by step Does there appear to be a positive or negative relationship between price and screen size? Use a scatter plot to examine the relationship. Determine and interpret the correlation coefficient between the two variables. In your interpretation, discuss the direction of the relationship (positive, negative, or zero relationship). Also discuss the strength of the relationship. Estimate the relationship between screen size and price using a simple linear regression model and interpret the estimated coefficients. (In your interpretation, tell the dollar amount by which price will change for each unit of increase in screen size). Include the manufacturer dummy variable (Samsung=1, 0 otherwise) and estimate the relationship between screen size, price and manufacturer dummy as a multiple linear…arrow_forwardExercises: Find all the whole number solutions of the congruence equation. 1. 3x 8 mod 11 2. 2x+3= 8 mod 12 3. 3x+12= 7 mod 10 4. 4x+6= 5 mod 8 5. 5x+3= 8 mod 12arrow_forwardScenario Sales of products by color follow a peculiar, but predictable, pattern that determines how many units will sell in any given year. This pattern is shown below Product Color 1995 1996 1997 Red 28 42 21 1998 23 1999 29 2000 2001 2002 Unit Sales 2003 2004 15 8 4 2 1 2005 2006 discontinued Green 26 39 20 22 28 14 7 4 2 White 43 65 33 36 45 23 12 Brown 58 87 44 48 60 Yellow 37 56 28 31 Black 28 42 21 Orange 19 29 Purple Total 28 42 21 49 68 78 95 123 176 181 164 127 24 179 Questions A) Which color will sell the most units in 2007? B) Which color will sell the most units combined in the 2007 to 2009 period? Please show all your analysis, leave formulas in cells, and specify any assumptions you make.arrow_forward
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