SOLUTION: 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.

Question 1120174: 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.
a. For a 10-day period, here are the number of people treated each of those 10 days:
Day | Number treated:
1 | 25
2 | 19
3 | 17
4 | 15
5 | 20
6 | 24
7 | 30
8 | 19
9 | 16
10 | 23
b. For a 10-day period, here are the number of people treated each of those 10 days:
Day | Number treated
1 | 20
2 | 15
3 | 12
4 | 21
5 | 24
6 | 28
7 | 32
8 | 26
9 | 35
10 | 37
Make a control chart for the daily number treated for each of the tables above, and plot this data on seperate charts. Do the data indicate that the number of people treated is �in control�? Explain your answer.

Answer by ViviNH14(2) (Show Source): You can put this solution on YOUR website!
A) Average: 20.8, Standard deviation: 4.66.
This does indicate that the number of people treated is in control.
B) Average: 26, SD: 8.9
This doesn't indicate that the number of people treated is in control, since the numbers are no where close as the question asked.
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