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Suppose a seller has daily profit X from his shop, however he pays a monthly rent of $700 for the place in the shopping mall. If his daily profit X has mean $200 and standard deviation $20 then what is the mean and standard deviation of his net monthly profit.
What is the probability that a cereal would both high calorie and high fiber? In other words, what is P (high calorie and high fiber)?
Explain how you can determine n3 from knowing n1 and n2. Thus, the multinomial distribution of (n1, n2, n3) is actually two-dimensional.
scientists at the hopkins memorial forest in western massachusetts have been collecting meteorological and environ-
A university employment office wants to compare the time taken by graduates with three different majors to find their first full-time job after graduation.
hypothesis testing of single mean.a recent article in the wall street journal reported that the 30-year mortgage rate
(a) Use the ANOVA approach to test the appropriate hypotheses. Use α = 0.05. (b) Test the appropriate hypothesis by using the two-sample t-test for comparing population means. Compare the value of the t-statistic to the value of the F -statistic calc..
A hair stylist has been in business one year. Sixty percent of his customers are walk-in business. If he randomly samples eight of the people from last week's.
A consumer organization wants to know if there is a difference in the price of a particular toy at three different types of stores. The price of the toy was checked in a sample of five discount toy stores, five variety stores, and five department ..
a questionnaire sent through the mail as part of a market research study consists of eight questions each of which can
Create an R chart for these data, using subgroups of size 4. Is the process variation under control?
Fit a linear trend equation to the following data describing average hourly earnings of U.S. production workers. What is the trend estimate for 2010?
The user of the statistics claims your interval is too wide to have any meaning in the specific use for which it is intended. Discuss and compare two methods of solving this problem.
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