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Three different point-of-purchase displays are being considered for lottery ticket sales at a chain of convenience stores. Two different locations within the store are also being considered. Eighteen stores for which lottery ticket sales have been comparable are randomly assigned to the six cells shown here, with three stores receiving each treatment. Data are the number of lottery tickets sold during the day of the experiment.
For these data, use the 0.025 level of significance in drawing conclusions about the main and interactive effects in the experiment. Determine the 95% confidence interval for the population mean for each factor level.
Find a 95% confidence interval on the difference in mean active concentrations for the two catalysts. Is there any evidence to indicate that the mean active concentrations depend on the choice of the catalyst? Base your answer on the results of par..
Write a few sentences describing the similarities and differences in brand preferences among eighth graders in the two regions listed.
Use critical values and the previously given sample information to test the hypotheses you set up in part α by setting α equal to .10, .05, .01, and .001. How much evidence is there that the manufacturer's claim is false?
A professor is studying the performance of various student groups in his class.- If the overall class average score is E [X| F] = 74.6 , what percentage of the class is female?
What is the 98% confidence interval for the true proportion of male office workers who work more than 50 hours per week?
What is the probability that at least 5 were able to recover from the theft in one week to one month? What is the probability that no more than 4 were able to recover from the theft in one week to one month?
Here are fifty observations on the weight of tea bags. Calculate the Standard Deviation and Variance.
question recently students in a marketing research class were interested in the driving behavior of students.
Do these results suggest that the racial makeup of the faculty members is different from that of the students? (Use the .05 significance level.) Use the five steps of hypothesis testing and explain your findings.
question aluminum and alzheimers disease.the relatives of a man recently diagnosed with alzhcimers disease are suing a
A week later, they are asked to rate the taste of each coffee on a scale of 1 (poor taste) to 10 (excellent taste). Is this an example of independent samples or dependent samples?
Describe the relevant population and the source (e.g. newspaper, TV, radio, internet, etc.). Explain why you do not believe it is accurate.
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