12. The costs of four models of four-wheel drive trucks are shown here. Find the weighted mean of the costs of the models. Model Number Sold Cost Chevrolet Colorado 6. $25,200 Toyota Tundra 10 $33,825 Jeep Gladiator $33,565 New to their Nissan Titan 4 $36,190 (SHOW YOUR WORK - Include Units)

The highway mileage (mpg) for a sample of 10 different models of a car company can be found below. 45 29 29 22 48 20 24 41 21 28 Find the mode: Find the midrange: Find the range:

Use this dataset for your analysis software. Cost-to-charge ratio (the percentage of the amount billed that represents the actual cost) for inpatient and outpatient services at 11 Oregon hospitals is shown in the following table. A scatterplot of the data is also shown. Hospital 1 2 3 O No 4 5 6 7 8 9 10 11 No No 100 90 80 70 60 50 Cost-to-Charge Ratio Outpatient Inpatient Care Care 45 62 66 63 51 75 65 56 45 48 71 54 å Inpatient 55 80 76 75 62 100 88 64 50 54 83 100 65 Outpatient The least-squares regression line with y = inpatient cost-to-charge ratio and x = outpatient cost-to-charge ratio is ý = -1.1 + 1.29 x. (a) Is the observation for Hospital 11 an influential observation? Yes (b) Is the observation for Hospital 11 an outlier? Yes 75 (c) Is the observation for Hospital 5 an influential observation? O Yes O No (d) Is the observation for Hospital 5 an outlier? O Yes O No

In a month where the price of eggs is above average, would you expect the price of milk to be above average or below average? Explain.

The frequencies of traffic fatalities of nonoccupants of vehicles are shown in the following bar chart. Change this to a bar chart of relative frequencies.

Listed below are the numbers of hurricanes that occurred in each year in a certain region. The data are listed in order by year. Find the range, variance, and standard deviation for the given sample data. Include appropriate units in the results. What important feature of the data is not revealed by any of the measures of variation? 9 12 20 12 The range of the sample data is (Round to one decimal place as needed.) The standard deviation of the sample data is (Round to one decimal place as needed.) The variance of the sample data is (Round to one decimal place as needed.) 5 9 16 3 What impactant fasturn of the data is not enunaled through the different m 5 16 variation 4 11 16 12 D

your car is more crowded than you think.  table 5.8 reports results from a 1969 personal transportation survey on "home-to-work" trips in metropolitan areas. The survey stated that the average car occupancy was 1.4 people. check that calculation.