The average age for licensed drivers in the county is u of o = 13.2 years. 40.3 years with a standard deviation a. A researcher obtained a random sample of n = 16 parking tickets and computed an average age of M = 38.9 years for the drivers. Compute the z-score for the sample mean and find the probability of obtaining an average age this young or younger for a random sample of licensed drivers. Is it reasonable to conclude that this set of n = 16 people is a representative sample of licensed drivers?

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21. The average age for licensed drivers in the county is u
of o = 13.2 years.
40.3 years with a standard deviation
a. A researcher obtained a random sample of n = 16 parking tickets and computed an
average age of M = 38.9 years for the drivers. Compute the z-score for the sample
mean and find the probability of obtaining an average age this young or younger for a
random sample of licensed drivers. Is it reasonable to conclude that this set of n =
16 people is a representative sample of licensed drivers?
b. The same researcher obtained a random sample of n = 36 speeding tickets and
computed an average age of M = 36.2 years for the drivers. Compute the z-score for the
sample mean and find the probability of obtaining an average age this young or younger
for a random sample of licensed drivers. Is it reasonable to conclude that this set of n
%3D
36 people is a representative sample of licensed drivers?
Transcribed Image Text:21. The average age for licensed drivers in the county is u of o = 13.2 years. 40.3 years with a standard deviation a. A researcher obtained a random sample of n = 16 parking tickets and computed an average age of M = 38.9 years for the drivers. Compute the z-score for the sample mean and find the probability of obtaining an average age this young or younger for a random sample of licensed drivers. Is it reasonable to conclude that this set of n = 16 people is a representative sample of licensed drivers? b. The same researcher obtained a random sample of n = 36 speeding tickets and computed an average age of M = 36.2 years for the drivers. Compute the z-score for the sample mean and find the probability of obtaining an average age this young or younger for a random sample of licensed drivers. Is it reasonable to conclude that this set of n %3D 36 people is a representative sample of licensed drivers?
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