You and some friends have decided to test the validity of an advertisement by Papa Jones...
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You and some friends have decided to test the validity of an advertisement by Papa Jones Pizza, which says it delivers to UL dormitories faster than Domino's Pizza. You define the variable of interest as the delivery time, in minutes, from the time the pizza is ordered to when it is delivered. You collect the data by ordering 12 pizzas each from Papa Jones and Domino's at different times. Sample Mean Papa Jones Domino's 16.7 Sample Standard Deviation 3.0955 18.88 2.8662 At the 0.05 level of significance, is there evidence that the mean delivery time for Papa Jones Pizza is less than the mean delivery time for Domino's Pizza? Question to address here: what is the degree of freedom for this problem? Select one: 99 a. 20 b. 21 C. 22 d. 19 e. 23 You and some friends have decided to test the validity of an advertisement by Papa Jones Pizza, which says it delivers to UL dormitories faster than Domino's Pizza. You define the variable of interest as the delivery time, in minutes, from the time the pizza is ordered to when it is delivered. You collect the data by ordering 12 pizzas each from Papa Jones and Domino's at different times. Sample Mean Papa Jones Domino's 16.7 Sample Standard Deviation 3.0955 18.88 2.8662 At the 0.05 level of significance, is there evidence that the mean delivery time for Papa Jones Pizza is less than the mean delivery time for Domino's Pizza? Question to address here: what is the degree of freedom for this problem? Select one: 99 a. 20 b. 21 C. 22 d. 19 e. 23
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