The salaries of physicians in a certain speciality are approximate normally distributed. If 25 percent of these physicians earn below 180,000 dollars and 25 percent earn above 320,000 what fraction earn (a) Below 250,000 dollars? (b) Between 260,000 and 300,000 dollars?

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The salaries of physicians in a certain speciality are approximately
normally distributed. If 25 percent of these physicians earn below
180,000 dollars and 25 percent earn above 320,000 what fraction
earn
(a) Below 250,000 dollars?
(b) Between 260,000 and 300,000 dollars?
oportment of SBC Communications, Inc., all of
Transcribed Image Text:The salaries of physicians in a certain speciality are approximately normally distributed. If 25 percent of these physicians earn below 180,000 dollars and 25 percent earn above 320,000 what fraction earn (a) Below 250,000 dollars? (b) Between 260,000 and 300,000 dollars? oportment of SBC Communications, Inc., all of
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