Sixteen milk-yielding Ayrshire cows were fed a diet of silage that was supplemented with a vitamin con- tentrate. The following values refer to the milk fat concentration (g/kg) for each cow 20, 38, 44, 49, 42, 21, 48, 47 21, 22, 23, 26, 26, 44, 48, 29 (a) Create a stem-and-leaf display with two lines per stem. (b) What interesting feature of the data is made apparent when put into the stem-and-leaf display? (c) Calculate the mean averagel and median and explain why reporting a center for this data (mean or median) without providing a graph of the data is not very useful. 4. The back-to-back split stemplot shows the lifetimes of 15 Brand X and Brand Y batteries (number down the middle gives the stem and numbers under Brand X and Brand Y are leaves). Brand 21103 997753 3221 4 223334 456889 Key: 2141 or 2 represents 420429 bours for Brand X and Brand Y, respectively (a) What is the longest that any battery lasted? (b) Give a reason someone might prefer a Brand X battery (c) Give a reason someone might prefer a Brand Y battery

Gas mileage actually varies slightly with the driving speed of a car (as well as with highway vs. city driving). suppose your car averages 33 miles per gallon on the highway if your average speed is 54 miles per hour, and it averages 22 miles per gallon on the highway if your average speed is 75 miles per hour. answer parts (a) and (b) below. a. what is the driving time for a 2000-mile trip if you drive at an average speed of 54 miles per hour? what is the driving time at 75 miles per hour? the driving time at 54 miles per hour is nothing hours. (type an integer or decimal rounded to two decimal places as needed.) the driving time is at 75 miles per hour is nothing hours. (round to two decimal places as needed.) b. assume a gasoline price of $3.33 per gallon. what is the gasoline cost for a 2000-mile trip if you drive at an average speed of 54 miles per hour? what is the gasoline cost at 75 miles per hour? the gasoline cost at 54 miles per hour is $ nothing. (round to two decimal places as needed.) the gasoline cost at 75 miles per hour is $ nothing. (round to two decimal places as needed.)