Allergic reactions to poison ivy can be miserable. Plant ps) oils cause the reac

Question

Allergic reactions to poison ivy can be miserable. Plant ps) oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed off within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the table Re ction Within S After 5 minutes What is the probability that a person selected at random had a strong reaction given washed oil within 5 minutes? Express answer as a decimal rounded to the nearest hundredth P(strong, given washed within 5 minutes) )Allergic reactions to poison ivy can be miserable. Plant oils cause the reaction. Researchers at Allergy Institute did a study to determine the effects of washing the oil off within 5 minutes of exposure. A random sample of 1000 people with known allergies to poison ivy participated in the study. Oil from the poison ivy plant was rubbed on a patch of skin. For 500 of the subjects, it was washed of within 5 minutes. For the other 500 subjects, the oil was washed off after 5 minutes. The results are summarized in the table Within 5 After 5 minutes What is the probability that a person selected at random washed off the oil within 5 minutes? Express answer as a decimal rounded to the nearest hundredth Pwashed within 5 minutes) ipts extra credit

Explanation / Answer

5)

P(strong| washed within 5 minutes) =20/ 500 =0.04

6)

P(washed within 5 minutes ) =500/1000 =0.5

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