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According to a government study among adults in the 25- to 34-year age group, the mean...

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 $1928. Assume that the distribution of the amounts spent follows the normal distribution with a standard deviation of $434. Refer to the table in Appendix B.1. (Round z-score computation to 2 decimal places and the final answer to 2 decimal places.)

a. What percentage of the adults spend more than $2140 per year on reading and entertainment?

Percentage ________ %

b. What percentage spend between $2140 and $3000 per year on reading and entertainment?

Percentage _________ %

c. What percentage spend less than $1000 per year on reading and entertainment?

Percentage ________ %

Math   Statistics-And-Probability   
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