Automated lab analyser was tested by measurement of the gluc

Automated lab analyser was tested by measurement of the glucose concentration of the reference sample. The following data (in mmol/l) were obtained: Caclulate sample average and standart deviation, construct confidence interval for mean at significance level alpha = 0.01 For data from N5, construct confidence interval for variance at alpha = 0.10

Solution

average = 4.60+4.47+4.45+4.50+4.47+4.50+4.50+4.44+4.50/10 =4.495
st. deviation = .04478
confidence interval 4.46 to 4.53
For alpha=0.10 interval is 4.47 to 4.52