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Automobiles have different fuel economies (mpg), and commuters drive different distances to work or school. Suppose that a state Department of Transportation (DOT) is interested in measuring the average monthly fuel consumption of commuters in a certain city. The DOT might sample a group of commuters and collect information on the number of miles driven per day, number of driving days per month, and the fuel economy of their cars. Develop a predictive model for calculating the amount of gasoline consumed, using the following symbols for the data.
G = gallons of fuel consumed per month
m = miles driven per day to and from work or school
d = number of driving days per month
f = fuel economy in miles per gallon "
Suppose that a commuter drives 30 miles round trip to work 20 days each month and achieves a fuel economy of 34 mpg. How many gallons of gasoline are used?
The expected gains & losses under each economic type of conditions are shown in the following table.
cursion boat is proportional to the cube of its speed and is $40 per hour when the speed is 10 mph. Expenses are $270 per hour. Find the most economical speed at which to make a trip of any specified distance.
wheat production in a given year w depends on the average temperature t and the annual rainfall r. scientists estimate
what is the selling price of a watch that costs a jewelry store $70$ the store uses a markup of 38%.
What is the test statistic,What would the hypothesis be for such a test?
In a 1993 study, researchers took a sample of people who claimed to have had an intense experience with an unidentified flying object (UFO) and a sample of people who did not claim to have had such an experience. They then compared the two groups ..
a store was for 26,500 20,000 was paid in cash and the remainder was paid for with land value at $50 an acre how many acres of land were received.
in 1936 statistician and geneticist r.a. fisher reanalyzed mendels famous pea data and using the chi-square statistic
The cost of renting a truck is $230 per week plus a charge of $0.50 per mile driven. Write a linear equation that relates the cost C for a weekly rental in which the truck is driven x miles.
two minor league baseball players got a total of 236 hits. washington had 10 more hits than Sanchez. find the number of hits for each player.
a certain airline claims the 95% of its flights arrive on time. What is the probability that the propoportion of flights in the sample that arrive on time will be greater than .94?
An airline estimates that 98% of people booked on their flights actually show up. If the airline books 76 people on a flight for which the maximum number is 74, what is the probability that not enough seats will be available on the plane? Round an..
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