The marketing department of a firm in New York City is curious to see which group of U.S. high school students, from the 9th, 10th, 11th, or 12th grades, spends the most time watching television each day. After selecting 25 students randomly, they find that 9th graders watch the most television per day.

Part A:What is the population?

Part B:What is the sample of the population?

Part C:Discuss collaboratively: Explain the difference between population and sample.

A student boasts that he is the luckiest person alive because in a jar of marbles, in which there were two blue marbles and eight red marbles, he drew a blue marble out of the jar on four successive tries (after replacing the original). Skeptical, his friend conducts a simulation using a random number table. The digits 0 and 1 represent a success (drawing a blue marble), and the digits 2 through 9 represent not a success (drawing a red marble). Using the first 10 digits in the first row for the first draw and thenext10 digits in thesamerow for the second draw, he records the successes.

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