Data on the oxide thickness of semiconductor wafers are as follows:
425,431,416,419,421,436,418,410,431,433,423,426,410,435,436,428,411. 426, 409, 437, 422, 428, 413, 416. (a) Calculate a point estimate of the mean oxide thickness for all wafers in the population. (b) Calculate a point estimate of the standard deviation of oxide thickness for all wafers in the population. (c) Calculate the standard error of the point estimate from part (a). (d) Calculate a point estimate of the median oxide thickness for all wafers in the population. (e) Calculate a point estimate of the proportion of wafers in the population that have oxide thickness of more than 430 angstroms.