Before a new phone system was installed, the amount a company spent on personal calls followed a normal distribution with an ave
rage of $ 600 per month and a standard deviation of $50 per month. Refer to such expenses as PCE's (personal call expenses). Using the distribution above, what is the probability that during a randomly selected month PCE's were between $475.00 and $690.00 ?
2 answers:
You might be interested in