A process at Printwright, Inc.'s largest facility is used to make plastic gears for a computer printer. The data found in the worksheet Prob. 9-15 were gathered by a quality analyst. The gears were designed to be 3.57 ` 0.05 centimeters (cm) in diameter. Construct a histogram of the data. What can you observe about the shape of the distribution? What would you recommend to the production manager based on your analysis? 

Problem 9-15
Plastic Gear Data for Printwright, Inc.
3.52	3.55	3.55	3.55	3.63
3.58	3.55	3.63	3.55	3.55
3.49	3.50	3.52	3.56	3.53
3.53	3.57	3.58	3.49	3.61
3.52	3.58	3.62	3.52	3.52
3.50	3.58	3.63	3.52	3.52
3.51	3.58	3.55	3.58	3.55
3.54	3.52	3.63	3.58	3.61
3.54	3.55	3.61	3.58	3.61
3.57	3.53	3.63	3.57	3.61
3.57	3.53	3.62	3.57	3.54
3.62	3.53	3.64	3.57	3.54
3.62	3.53	3.65	3.57	3.55
3.62	3.53	3.62	3.54	3.61
3.53	3.53	3.54	3.51	3.54
3.56	3.57	3.56	3.58	3.60
3.56	3.57	3.56	3.58	3.60
3.56	3.57	3.56	3.59	3.60
3.56	3.57	3.56	3.59	3.60
3.57	3.57	3.56	3.59	3.60
3.57	3.57	3.56	3.59	3.60
3.57	3.57	3.56	3.59	3.60
3.57	3.57	3.62	3.59	3.60
3.57	3.57	3.54	3.59	3.60
3.57	3.58	3.62	3.59	3.60
3.57	3.58	3.62	3.59	3.61
3.57	3.58	3.64	3.60	3.52
3.57	3.58	3.62	3.60	3.52
3.57	3.58	3.51	3.60	3.52
3.57	3.58	3.55	3.55	3.52

6. The Cabo Fiesta Mexican Restaurant is trying to determine whether sales of its popular Pan Con Mucho Sabor breadsticks are correlated with the sales of margaritas. It has data on sales of bread- stick baskets and margaritas for 25 weeks, shown in the worksheet Prob. 9-20. Plot a scatter diagram and compute the correlation using Excel tools. What do your results indicate?

Problem 9-20
Cabo Fiesta Mexican Restaurant
	Breadsticks
Week	Orders	Margaritas
1	850	1340
2	860	1340
3	790	1300
4	860	1340
5	870	1370
6	790	1240
7	805	1285
8	790	1240
9	740	1170
10	720	1130
11	730	1150
12	685	1070
13	710	1150
14	740	1140
15	635	1030
16	660	990
17	720	1210
18	880	1370
19	880	1400
20	920	1370
21	930	1410
22	840	1240
23	830	1260
24	825	1235
25	790	1260