Project #3609 - STATS

Overall, the amount of work-hours involvedin the festival preparation by company employees is normally distributed around 150 hours with a standard deviation of 20 hours. 

 


How likely (what is the probability) is it that somebody will have his involved work-hours between 140 and 170?

What percentile does an amount of 150 work-hours rank at?

What percentile does an amount of 120 work-hours rank at?

If 49 people (49 = size of the sample) are selected randomly, what’s the likelihood that their mean number of work-hours will be within 4 of the population mean? (mean +/- 4)

 

 

Subject Mathematics
Due By (Pacific Time) 03/28/2013 12:00 am
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