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Assume that a factory has two machines. Past records show that Machine 1 produces 30 per cent of the output. 5 per cent of items produced by Machine 1 were defective and only 1 per cent produced by Machine 2 were defective. If an item selected at random is found to be defective, what is the probability that it was produced by Machine 2.
An electronic test equipment manufacturing company markets a certain piece of specialty equipment. The company has several competitors who currently market similar pieces of equipment.
Is there evidence to suggest that the training course helps out sales people?
Compute and interpret each of the statistics in parts(a) through (f) Mean and Median.
Use the fact that the confidence interval for the mean is in the for x- E to x+ E to compute the sample mean and the mazimal margin of error E.
Find out the forecast value utilizing three month moving average method, weighted moving average method, exponential smoothing and regression methods.
Construct an appropriate control chart and comment on the process.
Find the percentage of the 1000 enemy that will be destroyed.
Find out optimal decision
Use Chebyshev's theorem to find what percent of the values will fall between 120 and 150 for a data set with mean of 135 and standard deviation of 7.5
Find the correlation coefficient for the data. Find the equation for the regression line for the data and predict the final grade of a student who misses 3.5 days.
Select a variable. Compare the mean of the variable for a sample of 30 for one group with the mean of the variable for a sample of 30 for a second group. Use a z test.
An economic researcher would like to know whether he can reject the null hypothesis at the 0.10 level, that no more than 20% of the households in Pennsylvania make more than $70,000 per year.
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