The following random sampled data was submitted for analysis: 33.4, 42.2, 37.1, 44.2, 46.0, 34.0, 32.6, 42.7, 32, 39.5.
(a) Determine the sample mean and the 95% confidence interval for the population mean.
(b) Determine the sample standard deviation and the 95% confidence interval for the population standard deviation.
(c) Display the data using a histogram and normal probability plots.
(d) Using the plots and Z table estimate the range of responses expected 90% of the time. Comment on the validity of the analysis and results.
(e) Estimate process capability/performance metrics for a specification of 40.0 7.0. Comment on the validity of the analysis and results.
(f ) Describe possible sources for this data.