Consider the following sample of observations on coating thickness for low-viscosity paint. 0.83 0.88 0.88 1.03 1.09 1.12 1.29 1.31
1.39 1.49 1.59 1.62 1.65 1.71 1.76 1.83
Assume that the distribution of coating thickness(a normal probability plot strongly supports this assumption).
A. Calculate a point estimate of the value that separates the largest 10% of all values in the distribution from the remaining 90%.
B. Estimate P(X < 1.4), i. e., the proportion of all thickness values less than 1.4.