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  3. you want to obtain a sample to estimate a populati

You want to obtain a sample to estimate a population mean. Based on previous evidence,...

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Basic Math

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You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe the population standard deviation is approximately ? = 26.7. You would like to be 98% confident that your estimate is within 5 of the true population mean. How large of a sample size is required?Do not round mid-calculation. However, you are encouraged to use a critical value accurate to three decimal places - this is important for the system to be able to give hints for incorrect answers.

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