The acceleration times in seconds) from 0 to 60 miles per hour for 26 randomly selected sedans
are shown in the table at the left. The sample is
from a normally distributed population,
Construct a 98% level of confidence interval for
the population standard deviation, round your
intervals to the nearest hundredths. (Adapted
from Consumer Reports) *
Acceleration times
(in seconds)
6.8 8.3 7.6 7.2 7.5 7.6 93
7.8 9.4 6.4 8.2 7.7 7.8 9.8
6.3 6.4 8.9 6.2 9.0 9.6 8.3
9.1 6.2 9.7 7.1 9.4