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Question: a study was instigated to see if southern california earthquakes...

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A study was instigated to see if southern California earthquakes of at least moderate size (having values of at least 4.4 on the Richter scale) are more likely to occur on certain days of the week than on others. The catalogs yielded the following data on 1,100 earthquakes.

Sun Mon Tues Wed Thurs Fri at Day Number of Earthquakes 156 144 170 158 172 148 152

Test, at the 5 percent level, the hypothesis that an earthquake is equally likely to occur on any of the 7 days of the week.

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