Insufficient data. Mean? Standard deviation?
Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability below each Z value. Multiply by 100.
The life spans of three randomly selected tires are
28,100
miles,
37,900
miles, and
33,000
miles. Using the empirical rule, find the percentile that corresponds to each life span.
1 answer
1 answer