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Mathematics, 16.10.2020 22:01 trinityhayes347
A contractor claims that she finishes a job on time 90% of the time. Last month, she only completed 7 out of her 10 jobs on time. To see if this is surprisingly low, a simulation was conducted 100 times under the assumption that she really does complete 90% of her jobs on time.
The dotplot contains 100 trials of this simulation.
Based on this dotplot and the sample of last month’s on-time completions, which conclusion can be drawn?
The contractor’s true, on-time completion rate is only 50%.
It is most likely that the contractor will complete about 9 out of 10 jobs.
If we used a larger sample size of 40 jobs, the simulated dotplot would be different; therefore, we cannot draw a conclusion.
The dotplot does not provide convincing evidence that her true, on-time completion rate is less than 90% because 7 or fewer on-time completions happened 19% of the time in the simulation.
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A contractor claims that she finishes a job on time 90% of the time. Last month, she only completed...
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