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69 A random sample of 70 houses revela the following: heated area of the houses in sg feet (mean) 1759 (std dev) 380 42 houses have central air.

8.69 A random sample of 70 houses revela the following: heated area of the houses in sg feet (mean) 1759 (std dev) 380 42 houses have central air.construct a 99% confidence interval estimae for the population mean heated area of the houesconstruct a 95% confidence interval estimate for population proportion of houses that have central air

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