Mai and Rafael walk around a track. Mai walks each lap in minutes. Rafael walks each lap in minutes. The two of them begin at th
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Answer:
The confidence level for this interval is 99%.
Step-by-step explanation:
The margin of error M has the following equation.
In which is the standard deviation of the population and n is the size of the sample.
z is related to the confidence level.
In this problem:
So
Looking at the z table, has a pvalue of 0.995.
So the confidence level is:
The confidence level for this interval is 99%.