Suppose you are investigating the percentage of dissatisfied customers, taking a survey of 100 customers per day over the course of 30 days. You find that, on average, 20% of customers are dissatisfied. What would the UCL of the appropriate control chart be, using Z = 3? Group of answer choices a Less than 0 b 0 c Greater than 0 but less than 0.2 d Greater than or equal to 0.2 but less than 0.4 e Greater than or equal to 0.4 but less than 0.5 f Greater than 0.5

Practical Management Science
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Suppose you are investigating the percentage of dissatisfied customers, taking a survey of 100 customers per day over the course of 30 days. You find that, on average, 20% of customers are dissatisfied. What would the UCL of the appropriate control chart be, using Z = 3?
Group of answer choices
a Less than 0
b 0
c Greater than 0 but less than 0.2
d Greater than or equal to 0.2 but less than 0.4
e Greater than or equal to 0.4 but less than 0.5
f Greater than 0.5
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