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Prepare the hypotheses and identify the type of error.
Suppose you are the manager of a paint manufacturing factory. Your company has received complaints from customers that the containers hold less than the amount printed on them. On the other hand, corporate management is concerned that the containers hold more than the standard amount. You assign a statistician to verify the claims by the customers and the corporate management. A sample of containers was selected and the volume of paint in each container was measured. Assume that volume printed on each container is 1 gallon, how would you formulate the null and alternative hypotheses to test the customers\' claim? That of the corporate management? Both customers and corporate management? As a manager, what reasonable criteria will you use to set a value for the level of importance to be used in the test? Presume you arrive at the decision that there is not enough evidence to reject the null hypothesis, could you have made a mistake? What type of error would result in that case? Respond to at least two of your classmate's postings.
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
With this information, by constructing a 2 by 2 table, compute the predicative value positive and predictive value negative of the ELA in hypothetical population of 1000000 blood donors.
At the .05 significance level, can we conclude that the guideline is still reasonable?
Determine the probability that sample mean is between 7.5 and 8 minutes?
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
Make up a scatter diagram with 10 dots for each of the following situations:
Create a scatterlpot of P_RFM and P_HELM. If drawing plot by hand, use graph paper to make sure accuracy. Be sure you label axes. After you have created the scatterplot, consider its form and direction. Recognize outliers, if any.
Solve linear program graphically
Calculate the standard error. With 95% confidence, find out the margin of error?
Create the indicated confidence interval for population mean µ using a t- distribution.
When we say we have confidence level of 95% what do you believe our "margin of error" is?
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
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