An orthodontist has three financing packages, and each has a different service charge. He estimates that...

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An orthodontist has three financing packages, and each has a different service charge. He estimates that 20% of patients use the first plan which has a S10 finance charge; 10% use the second plan which has a $20 finance charge; and 70% use the third plan which has a $30 finance charge. Complete parts a and b. a) fomd the expected value of the service charge I got = 25 b) find the standard deviation of the service charge An orthodontist has three financing packages, and each has a different service charge. He estimates that 20% of patients use the first plan which has a S10 finance charge; 10% use the second plan which has a $20 finance charge; and 70% use the third plan which has a $30 finance charge. Complete parts a and b. a) fomd the expected value of the service charge I got = 25 b) find the standard deviation of the service charge

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10 of the patients choose plan 1 which has a 10 financial charge ... View the full answer