The cholesterol-reducing drug Lipitor consists of atorvastatin calcium. Results (based on data from the company Parke-Davis) summarising the incidence of headaches as an adverse reaction in clinical tests are given below. We are interested in evaluating the evidence that the incidence of headaches is dependent on the amount of atorvastatin used. PlaceboAtorvastatin 10 mgAtorvastatin 20 mgAtorvastatin 40 mgAtorvastatin 80 mgHeadache1947626No headache251816307788 1. If level of atorvastatin was independent of incidence of headaches, what would be the expected frequency in the headache and 20 mg cell? Would this cause any concern for a test of independence of these factors? Why?2. Combine the 20 mg and 40 mg results into one column, then perform a chi-squared hypothesis test at the 1% significance level to evaluate the evidence that the incidence of headaches is dependent on the amount of atorvastatin used.

1. The row totals and column totals are, Placebo Atorvastatin 10 mg Atorvastatin 20 mg…

1. If level of atorvastatin was independent of incidence of headaches, what would be the expected frequency in the headache and 20 mg cell? Would this cause any concern for a test of independence of these factors? Why? 2. Combine the 20 mg and 40 mg results into one column, then perform a chi-squared hypothesis test at the 1% significance level to evaluate the evidence that the incidence of headaches is dependent on the amount of atorvastatin used.

1. If level of atorvastatin was independent of incidence of headaches, what would be the expected frequency in the headache and 20 mg cell? Would this cause any concern for a test of independence of these factors? Why? 2. Combine the 20 mg and 40 mg results into one column, then perform a chi-squared hypothesis test at the 1% significance level to evaluate the evidence that the incidence of headaches is dependent on the amount of atorvastatin used.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.1: Measures Of Center

Problem 9PPS

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