Lunch break: In a recent survey of 655 working Americans ages 25-34, the average weekly amount spent on lunch was $43.5 with standard deviation $2.77. The weekly amounts are approximately bell-shaped.
Part 1 of 3
(a) Estimate the percentage of amounts that are between $35.26 and $51.88.
Almost all
of the amounts fall between $35.26 and $51.88.
Part 2 of 3
(b) Estimate the percentage of amounts that are between $38.03 and $49.11.
Approximately 95%
of the amounts fall between $38.03 and $49.11.
Part: 2/3
Part 3 of 3
(c) Between what two values will approximately 68% of the amounts be?
Approximately 68% of the amounts fall between
and S