Over an entire summer, an amusement park gets an average of 21.7 people per day that have to go to the infirmary. Some days it is higher than this. Some days it is lower than this. The standard deviation is 4.2. The distribution for the amount of people treated is approximately normal.

1. For a 10-day period, here are the number of people treated each of those 10 days:

Day	1	2	3	4	5	6	7	8	9	10
Number treated	25	19	17	15	20	24	30	19	16	23

Make a control chart for the daily number treated, and plot this data on that chart. Do the data indicate that the number of people treated is "in control"? Explain your answer.

1. For a 10-day period, here are the number of people treated each of those 10 days:

Day	1	2	3	4	5	6	7	8	9	10
Number treated	20	15	12	21	24	28	32	36	35	37

Make a control chart for the daily number treated, and plot this data on that chart. Do the data indicate that the number of people treated is "in control"? Explain your answer.