Question 1202776: According to a government study among adults in the 25- to 34-year age group, the mean amount spent per year on reading and entertainment is $1,875. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $640.
a. What percent of the adults spend more than $2,775 per year on reading and entertainment?
b. What percent spend between $2,775 and $3,175 per year on reading and entertainment?
c. What percent spend less than $1,075 per year on reading and entertainment?
Answer by ikleyn(52786)   (Show Source):
You can put this solution on YOUR website! .
Two TWIN problems were solved today under these links
https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1202777.html
and
https://www.algebra.com/algebra/homework/Probability-and-statistics/Probability-and-statistics.faq.question.1202778.html
Read them attentively. They are your TEMPLATES.
Having these templates in front of you,
solve this current problem in the same way,
repeating the same mantra mentally.
Happy calculations ( ! )
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