Question: Methods for accounting 4 Question 4 [12 marks] Part a) The mean of a sample of 25 observations was calculated as 500. The sample was

Methods for accounting 4

Question 4 [12 marks] Part a) The mean of a sample of 25 observations was calculated as 500. The sample was (4 marks) randomly drawn from a normal population whose standard deviation is 15. Estimate the population mean with 95% confidence. Part b) 8 marks) The following sample of 16 measurements was selected from a population that is approximately normally distributed. F Construct a 90% confidence interval for the population mean

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