1) A major car manufacturer wants to test a new engine to determine whether it meets newair-pollution standards. The mean emission (u) of all engines of this type must be lessthan 20 parts per million of carbon. Ten engines are manufactured for testing purposes,and the emission level of each is determined. The data (in parts per million) are listedbelow;15.6, 16.2, 22.5, 20.5, 16.4, 19.4, 16.6, 17.9, 12.7, 13.9Assuming that the manufacturer is willing to risk a type 1 error with probabilityα = 0.1,a) Does the given data supply above enough evidence to allow themanufacturer to conclude that this type of engine meets the pollutionstandard?

Given that,The level of significance is 0.1.The sample size is 10. The data listed is:…

Answered: 1) A major car manufacturer wants to…

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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The manager of an auto dealership would like to develop a model the fuel consumption of various car models based on engine size. The data is presented below. Manufacturer Engine Size (litre) Fuel Consumption (litres/100km,city driving) Hyundai Accent 1.5 8.9 Toyota Echo 1.5 7.1 Hyundai Accent 1.6 8.9 Kia rio 1.6 9.3 Mazda Protege 1.6 9.3 Honda Civic 1.7 8.1 Kia Spectra 1.8 10.9 Nissan Sentra 1.8 8.3 Pontiac Vibe 1.8 8.3 Toyota Corolla 1.8 8.1 Dodge SX 2.0 2 9.3 Ford Focus 2 8.9 Hyundai Elantra 2 9.6 Mazda Protege/proteges 2 9.9 Mitsubishi Lancer 2 9.7 Suzuki Aerio 2 9.1 Volkswagen Golf 2 10.1 Volkswagen Jetta 2 10.1 Chevrolet Cavalier 2.2 10 Oldsmobile Alero 2.2 10.1 Pontiac Grand AM 2.2 10 Saturn Ion 2.2 9.9 Saturn L200 2.2 10.1 Chrysler Sebring 2.4 10.6 Honda Accord 2.4 9.6 Hyundai Sonata 2.4 10.9 Kia Magentis 2.4 10.9 Mitsubishi Galant 2.4 11.3 Toyota Camry 2.4 10.2 Nissan Altima 2.5 10.4 Nissan Sentra 2.5 10.4…
find : c ) Does data provide evid. of an association between age and opinion of brand? Justify your answer.
70 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 5 0.0714 5 1 11 0.1571 16 2 11 0.1571 27 3 7 0.1 34 4 7 0.1 41 5 7 0.1 48 6 8 0.1143 7 70 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 2 times per week? %
An investigation of the properties of bricks used to line aluminum smelter pots was published in an article. Six different commercial bricks were evaluated. The life span of a smelter pot depends on the porosity of the brick lining (the less porosity, the longer the life span); consequently, the researchers measured the apparent porosity of each brick specimen, as well as the mean pore diameter of each brick. See the table. Apparent Porosity (y). Mean Pore Diameter (x). Click the icon to view the table. Data table Mean Pore Diameter Apparent Porosity (%) (micrometers) Brick Interpret the y-intercept of the line. Choose the correct answer below. 18.7 12.0 В 18.3 9.8 O A. The y-intercept is Bo- This value has no meaning because 0 is not in the observed range of the independent variable mean pore diameter. 16.3 7.3 6.9 5.4 O B. The y-intercept is Bo: For each unit increase in mean pore diameter, the mean porosity is estimated to increase by B0- 17.2 10.9 O C. There is not enough…
The following data are collected from pregnant women to compare the Plasma ascorbic acid level of smokers and non-smokers. Table: Plasma ascorbic acid values Non-smokers 0.97, 0.72, 1.00, 0.81, 0.62, 1.32, 1.14, 1.22, 0.90, 0.74, 0.88, 0.94 Smokers 0.88, 0.71, 0.98, 0.79, 1.01, 1.16, 0.78, 1.28 Test whether there is any difference between plasma ascorbic acid levels of smokers and non-smokers. Also find 95% confidence interval for the difference of two means. Describe your findings. Use alpha=0.05 [Hint: use hypothesis, test statistics confidence interval etc.]
110 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0 14 0.1273 14 1 15 0.1364 29 2 9 38 3 14 0.1273 4 11 0.1 63 5 17 0.1545 80 6 0.1091 92 7 18 0.1636 110 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 6 times per week? %
In an attempt to develop a model of wine quality as judged by wine experts, data on alcohol content and wine quality was collected from variants of a particular wine. From a sample of 12 wines, a model was created using the percentages of alcohol to predict wine quality. For those data, SSR=19,812 and SST=30,298. Use this information to complete parts (a) through (c) below. a. Determine the coefficient of determination, r2, and interpret its meaning. r2=enter your response here (Round to three decimal places as needed.) Interpret the meaning of r2. It means that enter your response here% of the variation in ▼ alcohol content wine quality can be explained by the variation in ▼ alcohol content. wine quality. (Round to one decimal place as needed.) b. Determine the standard error of the estimate. SYX=enter your response here (Round to four decimal places as needed.) c. How useful do you think this regression model is for predicting wine…
130 adults with gum disease were asked the number of times per week they used to floss before their diagnoses. The (incomplete) results are shown below: # of times floss per week Frequency Relative Frequency Cumulative Frequency 0.1077 14 13 0.1 27 13 40 3 15 0.1154 55 4 19 0.1462 74 5. 21 0.1615 6. 13 0.1 108 22 0.1692 130 a. Complete the table (Use 4 decimal places when applicable) b. What is the cumulative relative frequency for flossing 2 times per week? Submit Question
An insurance investigator has observed that people with some astrological signs tend to be safer drivers than people with other signs. Using insurance records, the investigator classified 150 people according to their astrological signs and whether or not they were involved in a car accident during the previous 12 months. Do the following data indicate a significant relationship between sign and accidents? Test with a = .05. Libra Leo Gemini Accident 7 4 19 No Accident 73 46 1
State the estimated coefficient for time and its interpretation. Also, state what the coefficient of determination is and its interpretation.
The National Hurricane Center provides data that list the number of large (category 3, 4, or 5) hurricanes that have struck the United States, by decade, from 1851-2020. Is there sufficient evidence that the number of large hurricanes have remained constant (per decade)? What are the degrees of freedom? Decade Count Decade Count 1851-1860 6 1941-1950 10 1861-1870 1 1951-1960 8 1871-1880 7 1961-1970 6 1881-1890 5 1971-1980 4 1891-1900 8 1981-1990 5 1901-1910 4 1991-2000 5 1911-1920 7 2001-2010 8 1921-1930 5 2011-2020 10 1931-1940 8 Chi-squared test for given probabilitiesdata: stormsX-squared = 13.589, df = 16, p-value = 0.6293 A. 107 B. 17 C. 13.589 D. 16

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