The numbers of calories in slices of stuffed-crust pizza and Thin €™N Crispy pizza are shown in Table 29 for various types of pizza at Pizza Hut. For each type of pizza, the difference in calories for stuffed-crust and Thin €™N Crispy slices is also shown.

a. StatCrunch can be used to find the information shown in Fig. 78. Compare the mean of the stuffed-crust data and the mean of the Thin €™N Crispy data. Referring to your knowledge of pizza, explain why your comparison makes sense.

b. Subtract the mean of the Thin €™N Crispy data from the mean of the stuffed-crust data. Round your result to the first decimal place. Compare the result and the mean (rounded to the first decimal place) of the paired differences. By referring to how the means are calculated, explain why this makes sense.
c. Subtract the standard deviation of the Thin €™N Crispy data from the standard deviation of the stuffed-crust data. Round your result to the first decimal place. Compare the result and the standard deviation (rounded to the first decimal place) of the paired differences.
d. Compare the standard deviation of the paired differences and the standard deviation of the stuffed-crust data. Also compare the standard deviation of the paired differences and the standard deviation of the Thin €™N Crispy data. On the basis of both comparisons, if someone is trying to lose weight, which is more important: deciding between stuffed-crust pizza and Thin €™N Crispy pizza or deciding which toppings to order?

Transcribed Image Text:

Table 29 Numbers of Calories in One Slice ( of a 14" Pizza) at Pizza Hut Stuffed- Crust Pizza Calories 310 310 380 400 310 440 Thin 'N Crispy Pizza Calories 260 280 320 320 250 390 350 240 Paired Difference of Stuffed-Crust Pizza Calories and Thin 'N Crispy Pizza Calories Type of Pizza Cheese Only Pepperoni Supreme Super Supreme Chicken Supreme Meat Lover's Pepperoni Lover's Veggie Lovers Ultimate Cheese 310 260 50 310 280 30 380 320 60 400 320 80 310 250 60 440-390 50 400 350 50 300 240 60 400 300 Lover's 340 280 340 280 60 Summary statistics: Column n Mean Std. dev. Stuffed 9 354.44444 51.505124 9 298.88889 49.860918 Difference 9 55.555556 13.333333