Favorable weather has been shown to be associated with increased tipping. Will just the belief that future weather will be favorable lead to higher tips? The researchers gave 60 index cards to a waitress at an Italian restaurant in New Jersey. Before delivering the bill to each customer, the waitress randomly selected a card and wrote on the bill the same message that was printed on the index card. Twenty of the cards had the message "The weather is supposed to be really good tomorrow. I hope you enjoy the day!" Another 20 cards contained the message "The weather is supposed to be not so good tomorrow. I hope you enjoy the day anyway!" The remaining 20 cards were blank, indicating that the waitress was not supposed to write any message. Choosing a card at random ensured that there was a random assignment of the diners to three experimental conditions. The table shows the percentage tips for the three messages. 20.8 18.7 19.9 20.6 22.0 23.4 22.8 Good weather report 24.9 22.2 20.3 24.9 22.3 27.0 20.4 22.2 24.0 21.2 22.1 22.0 22.7 18.0 19.0 19.2 18.8 18.4 19.0 18.5 Bad weather report 16.1 16.8 14.0 17.0 13.6 17.5 19.9 20.2 18.8 18.0 23.2 18.2 19.4 19.9 16.0 15.0 20.1 19.3 19.2 18.0 No weather report 19.2 21.2 18.8 18.5 19.3 19.3 19.4 10.8 19.1 19.7 19.8 21.3 20.6 To access the complete data set, click the link for your preferred software format: Excel Minitab JMP SPSS TI R Mac-TXT PC-TXT CSV CrunchIt! (a) Find the Tukey simultaneous 99% condence intervals for all pairwise differences among the three population means. These populations are \"Good and Bad,\" \"Good and None,\" and \"None and Bad.\" (Enteguysgursan on O\" rce: swgll'if! 18c .'eeofls'iillgaeljcslshen W.H. Freeman Question 3 of 3 Excel Minitab JMP SPSS 11 K Mac-1XI PC-1XI CSV Crunchit! (a) Find the Tukey simultaneous 99% confidence intervals for all pairwise differences among the three population means. These populations are "Good and Bad," "Good and None," and "None and Bad." (Enter your answers rounded to five decimal places.) MGood - M Bad lower value = MGood - M Bad upper value = MGood - M None lower value = MGood - M None upper value = INone - M Bad lower value = INone - M Bad upper value = Question Source: Moore, The Basic Practice Of Statistics, 8e | Publisher: W.H. Freeman