)Allergic reactions to poison ivy can be miserable. Plant pts) oils cause the re
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)Allergic reactions to poison ivy can be miserable. Plant pts) 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 Reaction Within 5 After 5 minutes Row total 390 What is the probability that a person selected at random had a strong reaction? Express answer as a decimal rounded to the nearest hundredth P(strong) = 4) Allergic reactions to poison ivy can be miserable. Plant pt) 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 Reaction Within S After 5 minutes Row total What is the probability that a person selected at random had no reaction given they washed the oil off within 5 minutes? Express answer as a decimal rounded to the nearest hundredth P(none, given washed within 5 minutes) =Explanation / Answer
3) P(Strong) = 140/1000 = 0.140
4) P(None, given washed within 5 minutes) = 420 / 500 = 0.84
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