A well-known study of 22,000 male physicians was conducted to determine if taking aspirin daily reduces the chances of a heart attack. Half of the physicians were assigned a regular doze of aspirin while the other half was given a placebo. Six years later, among those who took aspirin, 104 suffered heart attacks, while among those who took placebo, 189 suffered heart attacks. Does it appear that aspirin can reduce the number of heart attacks among the sample group that took aspirin? Conduct an appropriate hypotheses testing, using a = 0.01 significance level.

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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.