Parents tend to be very good at diagnosing their children's routine medical problems, such as ear infections, sinus infection, or strep throat. If an ailment is identified correctly, a trip to the doctor's office may be avoided. A physician may confer with a parent by telephone and simply call a pharmacy with a prescription for an antibiotic. Suppose parents are correct 85% of the time (incorrect 15% of the time) and 50 families with a child suffering from a minor illness are selected at random. a. Find the mean, variance and standard deviation of the number of parents who identify their child's illness correctly. b. Find the probability that at least 42 parents are correct. C. Find the probability that between 42 and 47 (inclusive) parents are correct.

Parents tend to be very good at diagnosing their children's routine medical problems, such as ear infections, sinus infection, or strep throat. If an ailment is identified correctly, a trip to the doctor's office may be avoided. A physician may confer with a parent by telephone and simply call a pharmacy with a prescription for an antibiotic. Suppose parents are correct 85% of the time (incorrect 15% of the time) and 50 families with a child suffering from a minor illness are selected at random. a. Find the mean, variance and standard deviation of the number of parents who identify their child's illness correctly. b. Find the probability that at least 42 parents are correct. C. Find the probability that between 42 and 47 (inclusive) parents are correct.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 5E

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