) A random sample of 20 nominally measured of the length of a plastic ball is taken andthe lengths are measured precisely. The measurements, in mare as follows XXXXXXXXXX XXXXXXXXXX,08 2,07...

) A random sample of 20 nominally measured of the length of a plastic ball is taken and the lengths are measured precisely. The measurements, in mare as follows 2.02 1.94 2.09 1.95 1.98 2.00 1.03 204 2,08 2,07 1.99 1.96 2.99 195 1.99 2.99 2.03 2.05 201 2.03 From the data, we caletilite Ex = 41.19, Ex* = 87.6977 Assuming that the lengths are normally distributed with unknown mean , and unknown variance 82 I find a 90% confidence interval for the variance of Interpret your results find a 90% confidence interval for the standard deviation Interpret your results.