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Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced was 345, with a standard deviation of 21. A sample of 60 afternoon-shift workers showed that the mean number of units produced was 351, with a standard deviation of 28 units. At the .05 significance level, is the number of units produced on the afternoon shift larger?
As part of this trial, they want to find out whether there is a difference between effectiveness for women and for men. At = .05, what is the test value?
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
Use this information to set up a 90 percent confidence interval for the proportion, p of all US workers who play hooky.
What additional strategies (up to 3) you would propose that may increase validity of the findings.
Find out the mean sum of squares of the treatment in one way ANOVA.The profits of individual traders in three departments, labelled by A, B and C, in a medium sized firm were recorded on one day.
What is the population from which your sample has been taken? Description of data taken from other sources. Preliminary analysis using histograms, box plots, scatter plots, etc. and investigation of outliers. Do you keep or discard identified outl..
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop. Check the normality assumption.
Illustrate what is the probability all four calls are infact emergencies. Illustrate what is the probability that three or more calls are not emergencies.
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
Determine the probability of choosing at random license plate which ends in the even number?
At a computer manufacturing company, the actual size of computer chips is normally distributed with a mean of 1 centimeter and the standard deviation of 0.1 centimeter. A random sample of 12 computer chips is taken. What is the possibility that th..
A local group claims that the police issue more than 60 speeding tickets a day in their area.
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