Many automotive experts believe that
speed limits on highways are too low. One particular
expert has stated that he thinks that most drivers
drive at speeds that they consider safe. He suggested
that the “correct” speed limit should be set at the
85th percentile. Suppose that a random sample of
400 speeds on a highway where the limit is 60 mph
was recorded. Find the “correct” speed limit.
4.50 Xr04-50 Accountemps, a company that supplies temporary
workers, sponsored a survey of 100 executives.
Each was asked to report the number of minutes they
spend screening each job resume they receive.
a. Compute the quartiles.
b. What information did you derive from the quartiles?
What does this suggest about writing your
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