Question: Adverse side effects are always a concern when testing and trying new medicines. Placebo-controlled clinical studies were conducted in patients 12 years of age and

Adverse side effects are always a concern when testing and trying new medicines. Placebo-controlled clinical studies were conducted in patients 12 years of age and older who were receiving €œonce-a-day€ doses of Allegra, a seasonal allergy dru g. The following results were published in the April 2005 edition of Reader€™s Digest.

Determine, at the 0.05 level of significance, whether there is a difference in the proportion of patients reporting headaches between the two groups.

Allegra Placebo (dose once a day) dose once a day) Side effects Number reporting headaches n 283 30 n 293

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