In the article An Investigation of the CaCO 3 CaF 2 K 2 SiO 3 SiO 2
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Means and standard deviations of the weight percents of these chemicals were estimated from measurements on 45 weld metals produced on HSLA-100 steel base metal. Assume the means and standard deviations (SD) are as given in the following table.
a. Find the mean carbon equivalent of weld metals produced from HSLA-100 steel base metal.
b. Assuming the weight percents to be independent, find the standard deviation of the carbon equivalent of weld metals produced from HSLA-100 steel base metal.
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