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The following stem-and-leaf chart from the Minitab software shows the number of units produced per day in a factory.
1
3
8
4
2
5
6
9
0133559
(7)
7
0236778
59
00156
10
36
a. How many days were studied?
b. How many observations are in the first class?
c. What are the minimum value and the maximum value?
d. List the actual values in the fourth row.
e. List the actual values in the second row.
f. How many values are less than 70?
g. How many values are 80 or more?
h. What is the median?
i. How many values are between 60 and 89, inclusive?
These predictions, however, are not very accurate. Discuss at least three reasons why these predictions may not be accurate and offer three ways in which you can increase the likelihood of accurately predicting your customers' purchases.
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