Question

number 14

Fuel consumption is commonly measured in miles per gallon (milgal). An agency designed new fuel consumption tests to be used starting with 2008 car models. Listed below are randomly selected amounts by which the measured MPG ratings decreased because of the new 2008 standards. Find the range, variance, and standard deviation for the sample data. Is the decrease of 4 mi/gal unusual? Why or why not? 2 2 3 1 3 3 4 2 2 2 2 1 1 2 2 3 1 2 2 2 The range of the sample data ismi/gal. (Type an integer or a decimal.) The variance of the sample data is(Round to one decimal place as needed.) The standard deviation of the sample data is Digal. Round to one decimal place as needed.) Is the largest decrease, 4 mi/gal, unusual? Why or why not? 0 A. O B. O C. O D. The decrease of 4 mi/gal is not unusual because it is within two standard deviations of the mean. The decrease of 4 mi/gal is not unusual because the sample is a simple random sample, in which no values are considered unusual The decrease of 4 migal is unusual because it is more than two standard deviations from the mean. The decrease of 4 milgal is unusual because the smallest value in a data set is usually an outlier.

Answer 1