EBK MINDTAP FOR KELLER'S STATISTICS FOR
11th Edition
ISBN: 9780357110676
Author: KELLER
Publisher: VST
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Question
Chapter 7.5, Problem 144E
To determine
Calculate the probability of the given Poisson random variable.
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QUESTION 2
The amount of time spouses shop for anniversary cards can be modeled by an exponential distribution with the average amount of time equal to 38 minutes. What
is the probability that a randomly selected spouse spends at least 30 minutes to shop for anniversary card?
5.100 Tossing a die. You are tossing a balanced die that has probability 1/6 of coming up 1 on each toss. Tosses are
independent. We are interested in how long we must wait to get the first 1.
(a) The probability of a 1 on the first toss is 1/6. What is the probability that the first toss is not a 1 and the second toss is a 1?
(b) What is the probability that the first two tosses are not 1s and the third toss is a 1? This is the probability that the first 1
occurs on the third toss.
4
(c) Now you see the pattern. What is the probability that the first 1 occurs on the fourth toss? On the fifth toss?
3. A salesman who frequently drives from Muscat to Sohar finds that his driving time is a random variable having
roughly a normal distribution with mean 4.3 hours and standard deviation 0.2 hour. Find the probabilities that
such a trip will take
a. more than 4.0 hours,
b. less than 5.0 hours.
C. Between 3.5 and 5.5 hours
Chapter 7 Solutions
EBK MINDTAP FOR KELLER'S STATISTICS FOR
Ch. 7.1 - Prob. 1ECh. 7.1 - Prob. 2ECh. 7.1 - Prob. 3ECh. 7.1 - Prob. 4ECh. 7.1 - Prob. 5ECh. 7.1 - Prob. 6ECh. 7.1 - Prob. 7ECh. 7.1 - Prob. 8ECh. 7.1 - Prob. 9ECh. 7.1 - Prob. 10E
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