masie03
17.03.2020 •
Mathematics
An online customer service department estimates that about 15 percent of callers have to wait more than 8 minutes to have their calls answered by a person. The department conducted a simulation of 1,000 trials to estimate the probabilities that a certain number of callers out of the next 10 callers will have to wait more than 8 minutes to have their calls answered. The simulation is shown in the following histogram.
Based on the simulation, what is the probability that at most 2 of the next 10 callers will have to wait more than 8 minutes to have their calls answered?
The figure presents a histogram with 8 bars of data. The horizontal axis is labeled Number of Callers, and the numbers 0 through 7, in increments of
1, are indicated. The vertical axis is labeled Relative Frequency, and the numbers 0 through 0.35, in increments of 0.05, are indicated. The data represented in the histogram are as follows. Number of callers, 0; Relative frequency, 0.181. Number of callers, 1; Relative frequency, 0.345. Number of callers, 2; Relative frequency, 0.284. Number of callers, 3; Relative frequency, 0.142. Number of callers, 4; Relative frequency, 0.039. Number of callers, 5; Relative frequency, 0.008. Number of callers, 6; Relative frequency, 0. Number of callers, 7; Relative frequency, 0.001.
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Ответ:
The correct option is;
A. 0 < x < 6
Step-by-step explanation:
The given data indicates how much Jack is paid on hourly wage is presented here as follows;
Hours
Pay
1
18
1.5
23
2
28
2.5
33
3
38
Given that the domain is the number of hours worked by Jack after school, and that he receives a set amount at all values of the number of hours worked, a reasonable domain is from 0, at which the pay is 8, to 6 which is less than the normal 8 hours a day job, as he works part time.
Therefore, the correct option is;
A. 0 < x < 6.