Small Businesses. Use this information for Exercises 86–90. The U.S. Small Business Administration publishes data on the number of small businesses in each of 327 metropolitan areas. This data is in the data file Small Businesses.
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smallbusinesses
89. Construct and interpret a 95% confidence interval for the population number of small firms per metropolitan area. Assume that the standard deviation is 25,000 firms.
8.1.89
(3189, 9209). We are 95% confident that the average number of small firms per metropolitan area lies between 3189 and 9209.