Intro to Stat_Part_21

Intro to Stat_Part_21 - 77 X 1 2 3 4 5 P(X) 0.03 0.50 0.24...

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Unformatted text preview: 77 X 1 2 3 4 5 P(X) 0.03 0.50 0.24 ? 0.07 0.04 Table 4.4 a. Describe the random variable X in words. b. Find the probability that a customer rents three DVDs. c. Find the probability that a customer rents at least 4 DVDs. Write your answer using proper notation. d. Find the probability that a customer rents at most 2 DVDs. Write your answer using proper notation. Another shop, Entertainment Headquarters, rents DVDs and videogames. The probability distri- bution for DVD rentals per customer at this shop is given below. They also have a 5 DVD limit per customer. X) 1 2 3 4 5 P(X) 0.35 0.25 0.20 0.10 0.05 0.05 Table 4.5 e. At which store is the expected number of DVDs rented per customer higher? f. If Video to Go estimates that they will have 300 customers next week, how many DVDs do they expect to rent next week? Answer in sentence form. g. If Video to Go expects 300 customers next week and Entertainment HQ projects that they will have 420 customers, for which store is the expected number of DVD rentals for next week higher? Explain. h. Which of the two video stores experiences more variation in the number of DVD rentals per customer? How do you know that? Exercise 4.39 (Solution on p. 84.) A game involves selecting a card from a deck of cards and tossing a coin. The deck has 52 cards and 12 cards are "face cards" (Jack, Queen, or King) The coin is a fair coin and is equally likely to land on Heads or Tails If the card is a face card and the coin lands on Heads, you win $6 If the card is a face card and the coin lands on Tails, you win $2 If the card is not a face card, you lose $2, no matter what the coin shows.If the card is not a face card, you lose $2, no matter what the coin shows....
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This document was uploaded on 10/31/2011 for the course STA 2023 at University of Florida.

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Intro to Stat_Part_21 - 77 X 1 2 3 4 5 P(X) 0.03 0.50 0.24...

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