Question: We Wish to estimate the average cost of adding a standard sized deck to a home using 90% confidence interval. If the results from similar

  1. We Wish to estimate the average cost of adding a standard sized deck to a home using 90% confidence interval. If the results from similar previous studies indicate that the standard deviation of cost is $120, how many homes that have added decks should we sample to achieve a bound on the error of estimation of $50

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