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What happens to the shape of the Chi Square distribution curve as the sample size gets larger? What about when the number of cells or groups gets larger?
Find out if the percentage distribution differs for smokers and non-smokers between men and women. Use Chi-square (level of significance .05)
A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC affiliate
Assume that a simple random sample has been selected from a normally distributed population. Find the test statistic, a range of numbers for the P-value
The accuracy of Polygraph Tests The data in the accompanying table summarize results from tests of the accuracy of polygraphs
To compute the probability of receiving at least 10 e-mails on such a day, he will use what type of probability distribution?
A teacher figures that final grades in the statistics department are distributed as A-25%, B-25%, C-40%, D-5%, and F-5%.
How many different ways is it possible to get seven heads in a sample of twenty coin flips?
A marketing group did 3 random samples of 250 people for a new cell phone product. The age range varied from 25-50. 86% of those surveyed
Where p represents the price in dollars per pound and q represents the quantity of crabmeat in pounds per day.
The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry.
The safety director of Honda USA took samples at random from the file of minor work-related accidents and classified them according to the time
In an epidemic of a certain disease, 920 children contracted the disease. Of these, 400 received no treatment, and of those, 98 suffered after-effects.
In a recent study, the following percentages of U.S. retail car sales based on size were reported: 28.1%small, 47.8% midsize, 7% large, and 17.1% luxury
Level of education attained by the women from a rural region is divided into three categories: can read/write degree; primary degree; secondary and above degree
Two hundred managers from various levels were randomly selected and interviewed regarding their concern about environmental issues
For many years TV executives used the guideline that 30 percent of the audience were watching each of the prime-time networks and 10 percent were watching
Far West University offers both day and evening classess in business administration. One question in a survey of students inquires how they perceive the pretige
A sales manager is curious whether day of the week makes any difference in number of sales made.
The director of advertising for the Carolina Sun Times, the largest newspaper in the Carolinas, is studying the relationship between the type of community
Suppose we have a multinomial population with four categories: A, B, C, and D. The null hypothesis is that the proportion of items is the same in every category
Where do women most often buy casual clothing? Data from the U.S. Shopper Database provided the following percentages for women shopping at each of the various
When testing for goodness-of-fit with Benford's law, it is necessary to combine categories because not all expected values are at least 5.
Prof. H. Elp Me- John, a mathematics counselor, is interested in the relationship between math anxiety and the successful completion of the introductory
A quality control engineer wants to compare the production process of parts manufactured by four different companies