4.26 NHTSA crash tests. Refer to the National Highway TrafficSafety Administration (NHTSA) crash tests of new carmodels, presented in Exercise 4.6 (p. 188). A summary ofthe driver-side star ratings for the 98 cars is reproducedin the MINITAB printout in the next column. Assume that1 of the 98 cars is selected at random, and let x equal thenumber of stars in the car's driver-side star rating.a. Use the information in the printout to find the proba-bility distribution for x.b. Find P(x = 5).e. Find P(x s 2).MINITAB Output for Exercise 4.26:Tally for Discrete Variables: DRIVSTARDRIVSTAR Count Percent24.081717.354 59S 189860.2018.37N-

a. The value of P(X=x) is obtained by dividing percent by 100. The probability distribution of x is…

Answered: NHTSA crash tests. Refer to the…

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 National Football League (NFL) records a variety of performance data for individuals and teams. To investigate the importance of passing on the percentage of games won by a team, the following data show the average number of passing yards per attempt (Yards/Attempt) and the percentage of games won (WinPct) for a random sample of 10 NFL teams for the 2011 season.† Team Yards/Attempt WinPct Arizona Cardinals 6.5 50 Atlanta Falcons 7.1 63 Carolina Panthers 7.4 38 Chicago Bears 6.4 50 Dallas Cowboys 7.4 50 New England Patriots 8.3 81 Philadelphia Eagles 7.4 50 Seattle Seahawks 6.1 44 St. Louis Rams 5.2 13 Tampa Bay Buccaneers 6.2 25 (a) Develop a scatter diagram with the number of passing yards per attempt on the horizontal axis and the percentage of games won on the vertical axis. A scatter diagram has 9 points plotted on it. The horizontal axis ranges from 5 to 9 and is labeled: Yards/Attempt. The vertical axis ranges from 0 to 90 and is labeled: Win %.…
Twenty-nine college students, identified as having a positive attitude about Mitt Romney as compared to Barack Obama in the 2012 presidential election, were asked to rate how trustworthy the face of Mitt Romney appeared, as represented in their mental image of Mitt Romney’s face. Ratings were on a scale of 0 to 7, with 0 being “not at all trustworthy” and 7 being “extremely trustworthy.” Here are the 29 ratings: 2.6 3.2 3.7 3.3 3.4 3.6 3.7 3.8 3.9 4.1 4.2 4.9 5.7 4.2 3.9 3.2 4.5 5.0 5.0 4.6 4.6 3.9 3.9 5.3 2.8 2.6 3.0 3.3 3.7 a 95% confidence interval for the mean rating. Is there significant evidence at the 5% level that the mean rating is greater than 3.5 (a neutral rating)?
Twenty students in a group of 40 at Dawn High elect for a course in statistics (St. Eleven students take up linear algebra (L). Five students enrolled for both courses. Represent the data in the Venn diagram below.
Estimate u from the following incomplete data : X= 1 3 4 5 기? 13 21 37
The data set shown below contains the number of hurricanes that occurred each year over a 14-year period. Some scientists claim that there has been an increase in the number of hurricanes as the years progressed. Complete parts (a) through (d). Year 10 11 12 13 140 # 3 4. 2 1 a) Create a histogram of these data. Choose the correct histogram below. OA. OB. Oc. OD. # of Hurricanes # of Hurricanes # of Hurricanes # of Hurricanes b) Describe the distribution. Is the distribution uniform, unimodal, or bimodal? O A. The distribution is uniform. O B. The distribution is bimodal. O C. The distribution is unimodal. Is the distribution symmetric or skewed?
A group of students were asked how many times they exercised in the past week. The results were: 0,0,0,0,0,1,1,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,4,5,6,7,7,7. a. Construct a histogram summarizing the data. Use [0,2), [2,4), etc. as the bins b. Describe the shape and the modality of the histogram.
Identify the type of mode in the following data. 85, 98, 58, 90, 78, 92, 87, 80, 82, 91, 97, 89, 95, 88. O a. No mode O b. Multimodal data O c. Bimodal data O d. Unimodal data
Calculate the appropriate measure of association for this study. Round to the nearest hundredth. In a recent case-control study, investigators enrolled 300 adults with heart disease and 300 healthy adults. During interviews with the participants, the investigators determined participants' use of multivitamins in childhood, which was dichotomized into yes or no. The 2x2 table below shows the frequencies of heart disease case and control status by multivitamin use during childhood. Heart Disease Multivitamin Use Yes No Total Yes 125 175 300 No 135 165 300 Total 260 340 600 QUESTION 4 What is the correct interpretation of the measure of association you calculated in the previous question? (Please consider your calculated number in place of "X" in the answers.) The ODDS of heart disease among people who took multivitamins during childhood is X times the odds of heart disease among people who did not take multivitamins during childhood. The ODDS of multivitamin use during childhood among…
Use the following data to calculate the expected frequencies for each category. fe Type fo A B Total 190 320 215 325
Let x be the percentage of 16- to 19-year-olds not in school and not high school graduates. Let y be the reported violent crimes per 1000 residents. Six small cities in Arkansas (Blytheville, El Dorado, Hot Springs, Jonesboro, Rogers, and Russellville) reported the following information about x and y. x 24.2 18.6 17.8 14.9 19.0 17.5 y 13.0 4.6 8.8 1.3 0.8 3.6 Complete parts (a) through (e), given Σx = 112, Σy = 32.1, Σx2 = 2137.7, Σy2 = 282.89, Σxy = 654.37, and r ≈ 0.763. (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 = (c) Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) x = y = = + x

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