Fred bags groceries at Bilo. On average, he fills 21 bags for every three customers. The graph below, represent the total bags F
red filled based on the number of customers. What is the average rate of change?
a.) 1
b.) 17
c.) 7
d.) 21
a.) 1
b.) 17
c.) 7
d.) 21
1 answer:
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Answer:
The minimum number of cities we need to contact is 96.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence interval
, we have the following confidence interval of proportions.
In which
Z is the zscore that has a pvalue of .
The margin of error is:
95% confidence interval
So , z is the value of Z that has a pvalue of
, so
.
In this problem, we have that:
The minimum number of cities we need to contact is 96.