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Statistics and Probability
1. In A National Survey Conducted By The Centers For Disease Control To Determine College Students'

1. In a national survey conducted by the Centers for Disease Control to determine college students' health- risk behaviors, college students were asked, "How often do you wear a seatbelt when driving a car?" The frequencies appear in the following table: Frequency Response Never Rarely Sometimes Most of the time Always 118 249 345 716 3093 Construct a probability model for seatbelt use by completing the table below probability Response Never Rarely Sometimes Most of the time Always 2. A bag of 100 tulip bulbs purchased from a nursery contains 40 red tulip bulbs. 35 yellow tulip bulbs, and 25 purple tulip bulbs. a) What is the probability that a randomly selected tulip bulb is red? (b) What is the probability that a randomly selected tulip bulb is purple? 3. Suppose that a company selects two people who work independently inspecting two-by-four timbers. Their job is to identify low-quality timbers. Suppose that the probability that an inspector does not identify a low-quality timber is 0.20. What is the probability that both inspectors do not identify a low-quality timber?

( 1 ) Response frequency probability Never 118 0.02610042 Rarely 249 0.05507631 Sometimes 345 0.07631055 Most of time 716 0.15837204 Always