A random sample of 900 homeowners in delaware county

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A random sample of 900 homeowners in Delaware County is taken in order to estimate the average amount of money spent by homeowners on landscaping this spring. It turns out that this group spent an average of $200 with a standard deviation of $150. A 95% confidence interval for the average amount spent on landscaping by all Delaware County homeowners is calculated to be $200 ± $10. Which is true about this situation?

Reference no: EM13705674

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