[Solved] In a selection of 80 properties on the market the mean age was 42.4 years with a SD of 12.5 years. Give 95% (2 marks) 99% (2 marks) Confidence

Question: In a selection of 80 properties on the market the mean age was 42.4 years with a SD of 12.5 years. Give

95% (2 marks)
99% (2 marks)
Confidence limits for the mean age of all properties in the area from which these were selected.
How large a sample would be necessary to establish the 95% confidence limits to +/- 1 year? (2 marks)

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[Solved] In a selection of 80 properties on the market the mean age was 42.4 years with a SD of 12.5 years. Give 95% (2 marks) 99% (2 marks) Confidence

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