4. Pronto Pizza. Recently a national chain pizza service set up near Pronto Pizz

Question

4. Pronto Pizza. Recently a national chain pizza service set up near Pronto Pizza, a family owned business. To compete, Pronto Pizza is considering offering a 30 minute delivery guarantee. To get more information about the current service, a sample of deliveries during one month was taken, totaling 240 deliveries in the sample (8 orders per day for 30 days). Data on the Prep Time (time to prepare the pizza), Wait Time (time between when the pizza is done cooking to when a driver picks it up), and Travel Time (time from the store to a customer's home) were

Explanation / Answer

g)Based on the box plot shown, value>7.5 are the outliers.

h)Median and IQR are not affected by outliers in the data and there are many in this data set.Hence we should use median and IQR instead of mean and standard deviation for reflecting the center and validity of the data.

i)Please provide the data for the prep times.

j)(i)From the given figure we can conclude that data is somewhat bell-shaped.

(ii)No, the claim is not true as the from the histogram we can observe that 15 is somewhere near the median.Hence approx. 50% took less than 15 minutes can be the right claim.

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