165k views
4 votes
In a recent survey of 645 working Americans ages 25-34, the average weekly amount spent on lunch as $44.02 with standard deviation $2.81. The weekly amounts are approximately bell-shaped.

a. Estimate the percentage of amounts that were less than $38.40. Round the answer to one decimal place. Approximately % of the amounts were less than $38.40.
b. Estimate the percentage of amounts that are between $41.79 and $47.41.
c. Estimate the percentage of amounts that are at least $38.98.
d. Between what two values will approximately 95% of the amounts be?

User Oktieh
by
2.8k points

1 Answer

4 votes

Answer:

use photo math it's great and free

User Mweathers
by
3.3k points