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There are 130 cabinets in a row in a warehouse. The first worker to arrive opens the door of every cabinet. The next employee visits every other door and closes it. The third arrives and visits every third door and opens it if it's closed, or closes it if opened. The fourth visits every fourth door and follows the same procedure. This continues until all 130 employees have arrived, with the 130th employee visiting only door 130.
Which doors, if any, are open after the last employee arrives?
The data is shown on the table. Is there a difference in mean SBP between treatments? Run the appropriate test at α= 0.05
When 500 college students are randomly selected and surveyed, it is found that 135 of them own personal computers (based on data from the America Passage Media Corporation).
Describe a problem (real or fictitious) for which it will be appropriate to utilize a hypothesis test. Describe how data will be collected, sample size, assumptions, level of measurement etc.
Tweleve cases of leukemia are reported in people living in a particular census tract over a 5 year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer incidence rates?
Determine whether the difference in proportions is significant at the 0.05 level.
A study of 25 graduates of four-year colleges by the American Banker's Association revealed the mean amount owed by a student in student loans was $14,381.
From this group of 2000 accounts what is the probability that an account has a balance of $500 or more, given that it is 3 or more years old?
Find the probability that the average of those counts is more than 81.4 mosquitos per square meter. Assume that the variable is normally distributed.
Categorize the following as discrete or continuous random variables.
Assume the population standard deviations are not the same. At the .05 significance level, is there a difference in the mean waiting time?
The Wall Street Journal recently ran an article indicating differences in perception of sexual harrassment on the job between men and women.
Employ the table of standard normal probabilities (z table) to answer the following questions.
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