There Have Been Many Studies That Looked at the Incidence

Multiple Choice

There have been many studies that looked at the incidence of heart attack on the different days of the week.Studies in Japan and Scotland seemed to find that there was a substantial "spike" in heart attacks on Mondays,perhaps as much as 20% more.A researcher studied a random selection of 200 heart attack victims and recorded the day of the week that their attack occurred.The following table summarizes the results. The researcher was interested in whether the distribution of heart attacks was the same or different across the days of the week. What are the null and alternative hypotheses the researcher should establish?

A) H₀: The distribution of heart attacks is independent of the days of the week H_a: The distribution of heart attacks depends on the days of the week
B) H₀: The probability of heart attack on any day is highest on Monday H_a: The probability of heart attack on any day is not highest on Monday
C) H₀: The probability of heart attack is the same for each day of the week H_a: The probability of heart attack is not the same for at least one or more days
D) H₀: The probability of heart attack is the same for each day of the week H_a: The probability of heart attack is different for each day of the week
E) H₀: The distribution of heart attack has a known distribution across the week H_a: The distribution of heart attack has an unknown distribution across the week