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The following are the numbers of defective parts produced in a shift by 10 workers before and after going through a very rigorous training program (assuming normality):
worker 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10
Before 15 12 16 14 18 12 13 17 10 16
After 8 5 10 5 14 4 6 6 3 12
a) Do these date provide sufficient evidence to indicate that the training program was effective? Use aplha = 0.05.
b) Find the p-value for the test.
Assume a business researcherwishes to test hypothesis that greater proportion of marketing managers keep track of such obligations.
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
Do the following: (a) Make a scatter diagram of the scores; (b) describe in words the general pattern of correlation, if any; (c) figure the correlation coefficient.
consider the following statement each culture has its own norms of etiquette. in a diverse society like america as well
At a large commercial bakery, one of the measures familiar with evaluate employees is the number of broken cookies per 1000 produced. The quality control department wants to determine if there is a relationship between years of experience and bro..
Calculate a four-quarter weighted moving average for the number of America Online (AOL) subscribers for the nine quarters of data. The data are reported in thousands.
Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval.
Represent (X,Y) as a function of (U,V). Find the joint density f(u,v) for (U,V) (Hint: take into account the region where it is non-zero). Calculate f(1,0) and input it as the answer.
By using the maximax criterion, what decision should be made by the decision maker?
A student team examined parked cars in four different suburban shopping malls. One hundred vehicles were examined in each loation.
What is the minimum sample size you should use to assure that your estimate of will be within the required margin of error around the population p?
Suppose that in a population of 10 items, 3 are defective and 7 are not. Suppose that two items are chosen at random for inspection. Let X be the number of defective items inspected. report all probabilities to a minimum of 5 decimal places of acc..
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