What are the conclusions of the study?
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What are the conclusions of the study?
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- Urban Travel Times Population of cities and driving times are related, as shown in the accompanying table, which shows the 1960 population N, in thousands, for several cities, together with the average time T, in minutes, sent by residents driving to work. City Population N Driving time T Los Angeles 6489 16.8 Pittsburgh 1804 12.6 Washington 1808 14.3 Hutchinson 38 6.1 Nashville 347 10.8 Tallahassee 48 7.3 An analysis of these data, along with data from 17 other cities in the United States and Canada, led to a power model of average driving time as a function of population. a Construct a power model of driving time in minutes as a function of population measured in thousands b Is average driving time in Pittsburgh more or less than would be expected from its population? c If you wish to move to a smaller city to reduce your average driving time to work by 25, how much smaller should the city be?5.1 Application: Yo. e Here is data for the amount of fat (in grams) for McDonald's chicken sandwiches: Sandwich McChicken Ⓒ Premium Grilled Chicken Classic Sandwich Premium Crispy Chicken Classic Sandwich Premium Grilled Chicken Club Sandwich Premium Crispy Chicken Club Sandwich Premium Grilled Chicken Ranch BLT Sandwich Premium Crispy Chicken Ranch BLT Sandwich Southern Style Crispy Chicken Sandwich Ranch Snack Wrap (Crispy) Ranch Snack Wrap (Grilled) Honey Mustard Snack Wrap (Crispy). Honey Mustard Snack Wrap (Grilled) Chipotle BBQ Snack Wrap (Crispy) Chipotle BBQ Snack Wrap (Grilled) Find the median and IQR. M = type your answer... IQR= type your answer... C 54 do 5 % Fat 16 g 10 g 20 g 17 g 28 g 12 g 23 g 17 g 17 g 10 g 16 g 99 15 g 99 A 6 g g DELL & 7 O 8 O ( 9 % ) 0Weight 1.897 Cost 53.6 3.019 184.9 0.453 6.4 0.988 23.5 1.058 33.4 2.1 110.4 2.387 104.6 People at SpaceX Inc conducted a pilot study to determine the relationship between the weight and cost of a major object being sent into space. The results of the pilot study are contained in data file ASP.1, available in the LBRT #2 folder. Determine the number of observations needed to be 89% confident that the estimate of the average cost is within $15 of the overall mean cost. Note: Assume that the pilot study standard deviation is a good estimate of the population standard deviation, that an appropriate value from the Z-table can be used, and that hand calculations are used to find the answer (i.e. do not use Kaddstat).
- Winter visitors are extremely important to the economy of Southwest Florida. Hotel occupancy is an often- reported measure of visitor volume and visitor activity. Hotel occupancy data for February in two consecutive years are as follows. Current Year Previous Year Оссирied Rexms 1470 1458 Total Rooms 1750 1800 a. Formulate the hypothesis test that can be used to determine if there has been an increase in the proportion of rooms occupied over the one-year period. b. What is the estimated proportion of hotel rooms occupied each year? Using a 0.05 level of significance, what is your hypothesis test conclusion? What is the p-value? C. d. What is the 95% confidence interval estimate of the change in occupancy for the one-year period?Weighing Seals with a Camera. Listed below are the overhead widths (cm) of seals measured from photographs and the weights (kg) of the seals (based on “Mass Estimation of Weddell Seals Using Techniques of Photogrammetry,” by R. Garrott of Montana State University). The purpose of the study was to determine if weights of seals could be determined from overhead photographs. Find the predicted weight of a seal if the overhead width measured from a photograph is: a. 8.4 cm b. 9.4 cm c. 10.2 cm (Hint: Compute first the equation of the least squares lines).