Overall, the amount of workhours 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 workhours between 140 and 170? 
What percentile does an amount of 150 workhours rank at? What percentile does an amount of 120 workhours rank at? 
If 49 people (49 = size of the sample) are selected randomly, what’s the likelihood that their mean number of workhours 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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