Under the appropriate null hypothesis, what is the expected number of heart attacks that occur on Monday?

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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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.
Day
Sunday Monday Tuesday Wednesday Thursday Friday Saturday
Count 24
36
27
26
32
26
29
The researcher was interested in whether the distribution of heart attacks was the same or different across the
days of the week.
Under the appropriate null hypothesis, what is the expected number of heart attacks that occur on Monday?
36.0
28.6
Not within ± 1 of any of these
34.3
40.2
Transcribed Image Text: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. Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday Count 24 36 27 26 32 26 29 The researcher was interested in whether the distribution of heart attacks was the same or different across the days of the week. Under the appropriate null hypothesis, what is the expected number of heart attacks that occur on Monday? 36.0 28.6 Not within ± 1 of any of these 34.3 40.2
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