Asked by Erin
It is estimated that heights of adult men are normally distributed with a mean of 70 inches and a standard deviation of 3.5. In one state, the law requires a person to be 68 inches or taller to become a fire fighter.
(a) What proportion of adult men will meet this height requirement for becoming a fire fighter in this state?
(b) A person who was denied to become a fire fighter learned that his height was at the 20th percentile. What was his actual height?
(a) What proportion of adult men will meet this height requirement for becoming a fire fighter in this state?
(b) A person who was denied to become a fire fighter learned that his height was at the 20th percentile. What was his actual height?
Answers
Answered by
PsyDAG
a. 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 related to the Z score.
b. Use same table to find Z and insert into equation above to solve.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.
b. Use same table to find Z and insert into equation above to solve.
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