Question

Given the enclosed set of fifty observations of Weight of Coating of Galvanized Iron Sheets (oz/ft?) It is desired to perform the following determinations 1) Estimate the population parameters mean and standard deviation using the method of moments Form two histograms of the fifty observations. One showing the frequency of observations, and the second showing the probability density in each class interval 2) 3) Draw this last histogram together with the PDF of the normal distribution for the mean and standard deviation determined in part D. Observe and discuss the goodness of fit of this PDF and the histogram; 4) Sort the data in ascending order and calculate the plotting position on a Normal probability paper [mN+1)1 Estimate the mean and the standard deviation from the resulting graph; 5) Perform a Chi square test of the goodness of fit of the histogram by the normal distribution for a 5% level of significance; Data Set: Weights of Coating of Galvanized Iron Sheets (oz/ft) 1.467 1.603 1.577 1.563 1.437 1.623 1.603 1.577 1393 1350 1.520 1.383 1.323 1.647 1.530 1.767 1.730 1.620 1.620 1.383 1.550 1.700 1473 1.530 1457 1533 1600 1.420 1470 1.443 1377 1.603 1.450 1.337 1473 1.373 1.477 1.637 1.513 1 440 1.493 1337 1580 1.433 1637 1.460 1.533 1.557 1.563 1.500 Suggestion, using matlab will save you a lot of time!!

Answer 1

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