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    Vancouver marathon

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    I need some guidance for the following question:
    A researcher wishes to estimate the mean age of all runners who participate in the annual Vancouver marathon. A random sample of 36 participants indicated a mean age of 31.4 years. It is known that the population standard deviation of ages is sigma=7.2 years.

    Construct a 97% confidence interval for the population mean age.

    Note: express the confidence interval to 2 decimal places of accuracy.

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    Solution Summary

    This solution goes over how to construct a 97% confidence interval for annual Vancouver marathon runners.