Candy has observed 250 sports cars at an intersection and found that 15% did not make a complete stop. Candy tells you that the margin of error was 8%. What was the confidence level of the study?

The confidence level of the study is 99.9%

The confidence level is 99.9% of the margin error is 8%

Step-by-step explanation:

Explanation:-

Candy has observed 250 sports cars

The sample size 'n' = 250

Sample proportion 'p' = 15% = 0.15

The margin of error = 8% = 0.08

The margin of error  is determined by   =

Conclusion:-

The z- score of 99.9% level of significance = 3.54 for two tailed test

Hence the confidence level is 99.9% of the margin error is 8%.

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answer: d.) the total number of protons and neutrons is 15

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step-by-step explanation: