1. A toll-free number is available 9 a.m. to 9 p.m. for your customers to register complaints about products purchased from y
Past history indicates that an average 2.4 calls are received per hour.
Let X be the random variable which describes the number of phone calls to this toll-free number per hour.
a) Produce a table with the probability distribution of X, for X<11.
b) Draw a histogram.
c) What is the probabilty that there will be just one phone call during the next hour?
d) What is the probability that there will be more than 5 phone calls during the next hour?
about products purchased from your company.
mber per hour.
2. J.D. Power and Associates calculaes and publishes various statistics concerning car quality. The initial quality score measure
the number of problems per new car sold. For 2008 model cars, Ford has 1.12 problems per car; 2008 Dodge had 1.41 proble
a) If you purchased a 2008 Ford what is the probability that the new car will have zero problems?
b) If you purchased a 2008 Ford what is the probability that the new car will have more than 2 problems?
b) If you purchased a 2008 Dodge what is the probability that the new car will have zero problems?
d) If you purchased a 2008 Dodge what is the probability that the new car will have more than 2 problems?
y. The initial quality score measures
car; 2008 Dodge had 1.41 problems per car.
n 2 problems?
an 2 problems?
3. The increase or decrease in the price of a stock between the beginning and the end of a trading day
is assumed to be an equally likely randon event. What is the probability that a stock will show an increase
in its closing price on five consequitive days?
w an increase
4. In 2007, Air Canada had misshandled 0.7 bags per 100 passengers. What is the probability that in the next 500 pasengers, A
a) no misshandled bags?
b) al least one misshandled bag?
c) more than five misshandled bags?
y that in the next 500 pasengers, Air Canada will have