A random sample of 8 houses selected from a city showed that the mean size of these houses is 1,881.0 square feet with a standard deviation of 328.00 square feet.Assuming that the sizes of all houses in this city have an approximate normal distribution,the 90% confidence interval for the mean size of all houses in this city,rounded to two decimal places,is:

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The Answer of A random sample of 8 houses selected from a city showed that the mean size of these houses is 1,881.0 square feet with a standard deviation of 328.00 square feet.Assuming that the sizes of all houses in this city have an approximate normal distribution,the 90% confidence interval for the mean size of all houses in this city,rounded to two decimal places,is:

A Random Sample of 8 Houses Selected from a City