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An engineer who suspects that the surface finish of metal parts is influenced by the type of the paint used and drying time. He selected
An engineer who suspects that the surface finish of metal parts is influenced by the type
of the paint used and drying time. He selected three drying times and minutes
and used two types of paint. Three parts are tested and the data as follows:
a State the appropriate hypotheses using the analysis of variance?
b Construct ANOVA table?
c Does paint type affect the surface finish? Explain.
d Does drying time affect the surface finish? Explain
e Do Paint type and drying time interact? Hint :Plot the interaction plots
Known that it is particularly important for a supermarket to reasonably employ cashier
staff, reduce customers' waiting time and the operating costs of the supermarket and
improves efficiency. Waiting time and customer dissatisfaction has a proportional
relationship.
Suppose that a store manager such as LULU Hypermarket would like to perform an
experiment on the waiting time. He defines the Waiting time waiting time until reach the
cashier service time at the cashier Use the context of DOE to help the manager improve
the waiting time. Your answer should be in the following sequential approach
a Before the experiments Setting up the experiment, important factors levels...etc
eg cashier experience
b During The experiments how would you run the experiment
c Data Collection noise errors...etc
d Analysis of the results list of necessary statistical tests plots...etc
e Types of Conclusion effects of factors....etc
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