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(Exercises 27–40) For each description of data, identify the W’s, name the variables, specify for each variable whether its use indicates that it should be treated as categorical or quantitative, and, for any quantitative variable, identify the units in which it was measured (or note that they were not provided).
39. Kentucky Derby 2016 The Kentucky Derby is a horse race that has been run every year since 1875 at Churchill Downs in Louisville, Kentucky. The race started as a 1.5-mile race, but in 1896, it was shortened to 1.25 miles because experts felt that 3-year-old horses shouldn’t run such a long race that early in the season. (It has been run in May every year but one—1901—when it took place on April 29.) Above are the data for the first four and seven recent races.
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Intro Stats, Books a la Carte Edition (5th Edition)
- A study is planned to compare the proportion of teenagers (ages 13–19) who dislike anchovies with the proportion of young adults (ages 20–30) who dislike anchovies. A random sample of 41 teenagers was taken, and 78% of them disliked anchovies. A random sample of 56 young adults was also taken, and 71% of them disliked anchovies. Difference = Teenagers - Young Adults The picture below is the question. Use the information above to help.arrow_forwardO.R data preparation is a trivial step, due to the time required and the possibility of data collection errors. True of fallsarrow_forwardWnd questionarrow_forward
- please solve parts d e farrow_forwardCuckoos Cuckoos lay their eggs in the nests of other(host) birds. The eggs are then adopted and hatched by the host birds. But the potential host birds lay eggs of dif-ferent sizes. Does the cuckoo change the size of her eggs for different foster species? The numbers in the table arelengths (in mm) of cuckoo eggs found in nests of threedifferent species of other birds. The data are drawn from the work of O.M. Latter in 1902 and were used in a fun-damental textbook on statistical quality control by L.H.C. Tippett (1902–1985), one of the pioneers in that field.Investigate the question of whether the mean length ofcuckoo eggs is the same for different species, and stateyour conclusion. Cuckoo Egg Length (MM)Foster Parent SpeciesSparrow Robin Wagtail20.85 21.05 21.0521.65 21.85 21.8522.05 22.05 21.8522.85 22.05 21.8523.05 22.05 22.0523.05 22.25 22.4523.05 22.45 22.6523.05 22.45 23.0523.45 22.65 23.0523.85 23.05 23.2523.85 23.05 23.4523.85 23.05 24.0524.05 23.05 24.0525.05 23.05 24.0523.25…arrow_forwardA critically important aspect of customer service in a supermarket is the waiting time at the checkout (defined as the time the customer enters the line until he or she is served). Data were collected during time periods where there were a constant number of checkout counters open. The total number of customers in the store and the waiting times (in minutes) were recorded. The results are displayed in the accompanying table. Complete parts (a) through (d). LOADING... Click the icon to view the data table. a. Construct a scatter diagram. Choose the correct graph below. A. 05006CustomersTime x y graph B. 06050TimeCustomers x y graph C. 05006CustomersTime x y graph D. 06050TimeCustomers x y graph b. Assuming a linear relationship, use the least-squares method to find the regression coefficients b0 and b1. b0 = enter your…arrow_forward
- easure.arrow_forwardPlease answer all, will upvote your answerarrow_forwardCredits Textbooks 4 The table on the right contains data collected from students at Los Medanos 3. 120.25 College in 2009. The variable, credits, is the number of credits each student took during a particular semester. The variable, textbooks, is the amount of money (in dollars) that students spent on the textbooks that were required for their courses that semester. The credits and textbooks data come from student reports on a 4. 65.95 6. 465.00 12 430.00 14 396.50 survey. 16 475.00 8. 208.00 A Use technology to find the line of best fit (also called the least squares regression) line. (Think carefully about which variable is explanatory.) 5.00 49.10 15 685.00 6. 220.00 4 172.00 12 302.00 Use the line of best fit to predict the amount spent on textbooks for a student 12 460.12 taking 12 units. 12 530.00 16arrow_forward
- Asians and Hispanics. At a=0.05, can you reject the claim that the proportion of newlywed Asians who have a spouse of a different race or ethnicity is the same as the proportion of newlywed Hispanics who have a spouse of a different race or ethnicity?arrow_forwardAn engineer wants to determine how the weight of a gas powered car, x, affects gas mileage, y. The accompanying days represent the weights of various domestic cars and their miles per gallon in the city for the most recent model year. weight Miles per (pounds), x Gallon, y 3797 16 3897 16 2704 24 3608 20 3360 22 3040 22 3787 17 2618 24 3509 18 3798 16 3399 17 Interpret the slope y-intercept, if appropriate. Choose the correct answer below for y hat = -0.00661x + 41.80 Would it be reasonable to use the least squares regression line to predict the miles per gallon of a hybrid gas and electric car? Why or why not? Choose answer below a) No, because…arrow_forwardAn engineer wants to determine how the weight of a gas powered car, x, affects gas mileage, y. The accompanying days represent the weights of various domestic cars and their miles per gallon in the city for the most recent model year. weight Miles per (pounds), x Gallon, y 3797 16 3897 16 2704 24 3608 20 3360 22 3040 22 3787 17 2618 24 3509 18 3798 16 3399 17 interpret the slope y-intercept, if appropriate. Choose the correct answer below for y hat = -0.00661x + 41.80 A certain gas powered car weighs 3500 pounds and gets 18 miles per gallon. Is the miles per gallon of this car above average or below average for cars of this weight? Below or Average?arrow_forward
- Glencoe Algebra 1, Student Edition, 9780079039897...AlgebraISBN:9780079039897Author:CarterPublisher:McGraw HillHolt Mcdougal Larson Pre-algebra: Student Edition...AlgebraISBN:9780547587776Author:HOLT MCDOUGALPublisher:HOLT MCDOUGAL