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Patients seeking treatment for chest pain were divided into four groups according to their diagnosis. Their...

Patients seeking treatment for chest pain were divided into four groups according to their diagnosis. Their purpose of the research study was to determine if the mean platelet volume (measured in fL) differed for the four populations represented by the sample of the patients. The data are summarized below. Test the null hypothesis that the means of the populations are equal. Use the 8 step procedure to solve this problem

Population Sample Size Sample Mean Sample Standard Deviation Sample Variance
Noncardiac chest pain 35 10.89 0.69 0.476
Stable angina pectoris 35 11.25 0.74 0.548
Unstable angina pectoris 35 11.31 0.91 0.828
Myocardial infarction (heart attack) 35 11.75 1.07 1.145

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