Mike marks down the gas mileage of his two cars every time he fills them up with gas for 6 months straight. At the end he notes that his Mustang gets better mileage than his Corvette. Is this an experiment or an observational study?

Kim is analysing the performance of a variety of small cars when they are fitted with fuel saver tyres, compared with their original tyres fitted.  Explain how this research is collecting data by experiment.

Jesse notices that his gas mileage jumps from 20 to 40 miles per gallon when he uses his cruise control. One likely explanation for this is:A.Jesse's car is a hybrid that shuts off extra pistons when it is not accelerating.B.Jesse's car has an efficient air-to-fuel ratio.C.Jesse's car is powered by a biofuel that is not needed while cruising.D.Jesse's car is compressing and expanding efficiently.

A car manufacturer advertises that its new subcompact models get 47 miles per gallon (mpg). Let µ be the mean of the mileage distribution for these cars. You assume that the manufacturer will not underrate the car, but you suspect that the mileage might be overrated. State the null hypothesis and the alternate hypothesis for this case.a.H0: µ = 47mpg  and H1: µ ≠ 47mpgb.H0: µ = 47mpg  and H1: µ < 47mpgc.H0: µ = 47mpg  and H1: µ > 47mpgd.H0: µ ≥ 47mpg  and H1: µ < 47mpg

Andrew is considering two models of cars. The size, price, and options are identical. However, one model gets better gas mileage. This fact would be considered a(n) _____ product.Group of answer choicesaugmentedcoreancillaryactual

A local car manufacturer manufactures small automobiles that averaged 50 miles per gallon of gasoline in highway driving.The company has developed a more efficient engine for its small cars and now advertises that its new small cars average more than 50 miles per gallon in highway driving.  In a sample of 36 road-tested automobiles,  it showed an average of 51.5 miles per gallon and a standard deviation of 6 miles per gallon.Test to determine whether or not the manufacturer's advertising campaign is legitimate at 0.05 level of significance and using the p-value approach,  Group of answer choicesWith p-value of 0.0668, therefore, do not reject Ho. There is no sufficient evidence to conclude that the new cars average more than 50 mile per gallon.With p-value of 0.0068, therefore, reject Ho. There is sufficient evidence to conclude that the new cars average more than 50 miles per gallon.With p-value of 0.0724, therefore, do not reject Ho. There is no sufficient to conclude that the new cars average more than 50 miles per gallon.With p-value of 0.0008, therefore, reject Ho. There is sufficient evidence to conclude that the new cars average more than 50 miles per gallon.