A study done in Germany (Willich et al., 1993) looked at which days of the week people had heart attacks. One subgroup the researchers looked at were those who were employed. They found that the 884 heart attack victims had heart attacks distributed as shown in the following table. They wanted to know whether heart attacks are distributed evenly across the days of the week in the long run. Test as follows: 

a. State the hypotheses in words or in symbols.

b. Calculate the test statistic, and p-value.

c. State your conclusion in the context of the research question.  

d. Compare the observed counts to the expected counts to identify which days differ the most from what we would expect if the days were equally likely. Does your comparison make sense for individuals who are employed? Explain.

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Day Number of heart attacks Sun Mon Tue Wed Thur Fri Sat 106 160 123 115 141 107 132