What proportion of the families spends

Reference no: EM13196972

a simple random sample of 100 families was taken. the average weekly expenditure was $70 per week, with the standard deviation of $8. you may assume expenditure in the population to be normally distributed.

Required:

-what proportion of the families spends $85 or more per week on food?
-using the information above, find the expenditure value above which 80% of the family lie.

Reference no: EM13196972

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