Nausea from air sickness affects some travelers. In a comparative study of the effectiveness of two brands of motion sickness pills, brand A pills were given to 45 persons randomly selected from a group of 90 air travelers, while the other 45 persons were given brand B pills. The following results were obtained.

Do these observations demonstrate that the two brands of pills are significantly different in quality? Test at a = .05.

Degree of Nausea None Slight Moderate Severe Total Brand A 18 17 Brand B 11 14 45 45 14