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The restaurant owner Lobster Jack wants to find out what the
peak demand periods are, during the hours of operation, in
order to be better prepared tn serve his customers. He thinks
that, on average, 60% of the dailf,r customers come between
6:00pm and 8:59pm (equallyr distributed in that time) and the
remaining 40% of customers come at other times during the
operating hours (again equally distributed). He wants to
verify if that is true or not, so he asked his staff to write
down during one week the number of customers that come
into the restaurant at a given hour each day. His staff gave
him the following data: 9 Help the manager figure out if his instincts are correct or not.
Use a Chi-Squared test to see if the observed distribution is
similar to the expected. Use the average demand for a given
time as your observed value. What is the p-value of your Chi-Square test? I tried to get the answer following this, but I could not figure
out how to do it in Excel. Could you please show me?
TimeDay lDay 2Daj,r BDav 4Day 5Day fiDay T5:0Upm-
5:59pm151921201215156:00pm-
6:59pm30232425282926?:Uflpm-
T:5+9me62939353930328:00pm-
8:59pm2933232924322T9:Uflpm—
9:59pm2120121918142010:00pm- 10:59pm1212151210151411:00pm-11:59pm879101212
9

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