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Chapter 5: Q . 55 (page 351)
55.
A customer service representative must spend different
amounts of time with each customer to resolve various concerns. The amount of time spent with each customer can be
modelled by the following distribution:
Find the 70th percentile.
The answer of 70th percentile is
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A customer service representative must spend different
amounts of time with each customer to resolve various concerns. The amount of time spent with each customer can be
modelled by the following distribution:
Find .
Use the following information to answer the next seven exercises. A distribution is given as . What is m?
According to a study by Dr. John McDougall of his live-in weight loss program, the people who follow his program lose between six and 15 pounds a month until they approach trim body weight. Let鈥檚 suppose that the weight loss is uniformly distributed. We are interested in the weight loss of a randomly selected individual following the program for one month. a. Define the random variable. X = _________ b. X ~ _________ c. Graph the probability distribution. d. f(x) = _________ e. 渭 = _________ f. 蟽 = _________ g. Find the probability that the individual lost more than ten pounds in a month. h. Suppose it is known that the individual lost more than ten pounds in a month. Find the probability that he lost less than 12 pounds in the month. i. P(7 < x < 13|x > 9) = __________. State this in a probability question, similarly to parts g and h, draw the picture, and find the probability.
,a continuous probability function, is equal to and the function is restricted to . What is ?
Suppose that on a certain stretch of highway, cars pass at an average rate of five cars per minute. Assume that the duration of time between successive cars follows the exponential distribution.
a. On average, how many seconds elapse between two successive cars?
b. After a car passes by, how long on average will it take for another seven cars to pass by?
c. Find the probability that after a car passes by, the next car will pass within the next 20 seconds.
d. Find the probability that after a car passes by, the next car will not pass for at least another 15 seconds.
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