Based on this dotplot and the sample of last month’s on-time completions, which conclusion can be drawn?
Answer
A
It is most likely that the contractor will complete about 9 out of 10 jobs.
B
The contractor’s true, on-time completion rate is only 50 percent .
C
If we used a larger sample size of 40 jobs, the simulated dotplot would be different; therefore, we cannot draw a conclusion.
D
The dotplot does not provide convincing evidence that her true, on-time completion rate is less than 90 percent because 7 or fewer on-time completions happened 19 percent of the time in the simulation.