Practice Problems

Practice Problems - Problem Set Problem 10.7(p 400 In an...

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Problem Set Problem 10.7 (p. 400) In an agronomy experiment, peanuts with shriveled seeds were crossed with normal peanuts. The genetic model that the agronomists were considering predicted that the ratio of normal to shriveled progeny would be 3 : 1. They obtained 95 normal and 54 shriveled progeny. Do these data sup.ort the hypothesized model? (a) Conduct a chi-square test with = 0.05. Use a nondirectional alternative. (b) State your conclusion from part (a) in the context of this setting. Problem 10.20 (p. 410) Phenytoin is a standard anticonvulsant drug which unfortunately has many toxic side effects. A study was undertaken to compare phenytoin with valproate, a new drug, in the treatment of epilepsy. Patients were randomly allocated to receive either phenytoin or valproate for 12 months. Of 20 patients receiving valproate, 6 were free of seizures for the 12 months, while 6 of 17 patients receiving phenytoin were seizure-free. (a) Use a chi-square test to compare the seizure-free response rates for the two drugs. Let H A be non- directional and = 0.10.
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Practice Problems - Problem Set Problem 10.7(p 400 In an...

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