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A confidence interval estimate for a single proportion, based on a random sample of 500 is 0.372 to 0.428. From this information, what level of
A confidence interval estimate for a single proportion, based on a random sample of 500 is 0.372 to 0.428. From this information, what level of confidence level was used in this estimate?(Hint: Work backwards from the margin of error to find the critical value.)
- approximately 90%
- Approximately 80%
- Approximately 99%
- Approximately 95%
- It cannot be determined with the information given.
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