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Find a 95% confidence interval for the difference between the mean amount of the highest cost item purchased for the High customer category and the similar mean for the Medium customer category.
Do the same for the difference between the Medium and Low customer categories.
Because of the way these customer categories are defined, you would probably expect these mean differences to be positive. Is this what the data indicate?
Given what you've learned in this module about the meaning of "statistics", choose one of the examples from Part I (A-F), and raise a relevant question of your own that could be answered by a statistician.
What measurements assesses the amount of variance of change in the dependent variable reflected by changes in the independent variable?
Compute the standard deviation for the company and the index. Compute the correlation coefficient between Tokyo Ltd and the index. Compute the beta for Tokyo Ltd
based on the cell phone usage data what is the most economical individual plan?69.99 unlimited monthly1.99day
Write a paper of no more than 750 words in which you discuss the difference between comparative and ratio analysis. Differentiate and share the purpose and importance of each.
Pattern that most accurately represents mean, median and mode is?
Nancy believes that the average running time of movies is equal to 140 minutes. A sample of 4 movies was taken and the following running times were obtained. Assume the population of the running times is normally distributed.
Find the range and the standard deviation of the times.
a survey of 35 randomly selected iphone owners showed that the purchase price has a mean of 432 with a sample standard
a food scientist wishes to study the effect of the type of pan and amount of sodium bicarbonate used in preparing
Serum cholesterol levels were taken from a population of 10,000 college students. The results were normally distributed. Males had a mean of 195 and a standard deviation of 10.
Is the difference in the observed and hypothesized important? What does the difference in the observed and hypothesized values prove
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