Parametric Tests : Testing means and variances based on single and two samples using R.
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The following is a random sample of 15 measurements of thickness of plastic sheet (in inches) used for making chairs. 5.64,7.48,8.99,6.44,8.95,6.48,7.96,4.96,5.98,2.99,8.63,8.24,7.36,4.05,7.77 Test whether the population mean of thickness of the plastic sheet is 6.45 inches.
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The two following samples are drawn from two populations. Test the equality of varinaces of two populations. Sample I : 66.5,95.2,88.8,23.5,59.3,43.3,20.5,83.2,29.3,83.6 Sample II : 60.5,12.1,78.8,29.2,45.7,76.4,91.5,36.7,69.5,4.7,15.1,89.5,49.1
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Sample size n=25 and sample standard deviation=8.5. Test whether the sample is drawn from population whose standard deviation is 10.