Three shipping companies want to compare the mean numbers of deliveries their drivers complete in a day. The first two shipping companies provided their data from a sample of drivers in a table.

Company C showed its data in a dot plot.

Answer the questions to compare the mean number of deliveries for the three companies.

1. How many drivers did company C use in its sample?

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2. What is the MAD for company C's data? Show your work.

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3. Which company had the greatest mean number of deliveries?

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4. Compare the means for companies A and B. By how many times the MAD do their means differ? Show your work.

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An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

Asays "we are both knaves" and b says nothing. exercises 24–31 relate to inhabitants of an island on which there are three kinds of people: knights who always tell the truth, knaves who always lie, and spies (called normals by smullyan [sm78]) who can either lie or tell the truth. you encounter three people, a, b, and c. you know one of these people is a knight, one is a knave, and one is a spy. each of the three people knows the type of person each of other two is. for each of these situations, if possible, determine whether there is a unique solution and determine who the knave, knight, and spy are. when there is no unique solution, list all possible solutions or state that there are no solutions. 24. a says "c is the knave," b says, "a is the knight," and c says "i am the spy."

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone