1. The average cholesterol content of a
certain canned goods is 215 milligrams
and the standard deviation is 15
milligrams. Assume the variable is
normally distributed.
a) If a canned good is selected, what is
the probability that the cholesterol
content will be greater 220
milligrams?
b) If a sample of 25 canned goods is
selected, what is the probability that
the mean of the sample will be
larger than 220 milligrams?
2. The number of driving miles before a
certain kind of tire begins to show wear
is on the average, 16,800 miles with a
standard deviation of 3,300 miles. A
car rental agency buys 36 of these tires
for replacement purposes and puts
each one on a different car.
a) What is the probability that the 36
tires will average less than 16,000
miles until they begin to show
wear?
b.What is the probability that the 36
tiles will average more than 18,000
miles until they begin to show
wear?
1.
a) Let cholesterol content of a canned good:
Given
b) Let the mean of the sample:
Given
2.
Let the number of driving miles before a certain kind of tire begins to show wear :
Given
a)
b)
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