Suppose that Randy is an analyst for the bicyling industry and wants to estimate the asking price of used entry-level road bikes advertised online in the southeastern part of the United States. He obtains a random sample of ?=13n=13 online advertisements of entry-level road bikes. He determines that the mean price for these 13 bikes is ?=$681.87 and that the sample standard deviation is ?=$177.45. He uses this information to construct a 99% confidence interval for ?, the mean price of a used road bike. What is the lower limit of this confidence interval? Please give your answer to the nearest cent.

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A: n= 35 Sample size  σ=$226312.40 Population standard deviation

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A: N=2518 Mean =42.6 Standard deviation =16.7 Average =42 We have to test hypothesis.

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