Consider the following sample of observations on coating thickness for low-viscosity paint. 0.85 0.88 0.88 1.06 1.09 1.12 1.29 1.31 1.42 1.49 1.59 1.62 1.65 1.71 1.76 1.83 assume that the distribution of coating thickness is normal (a normal probability plot strongly supports this assumption). (a) calculate a point estimate of the mean value of coating thickness. (round your answer to four decimal places.) 1.3469 1.3469