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Question: In a certain problem, the randomization test produces an exact two-sided p-value of 0.053, while the t-distribution approximation produces 0.047. One might say that since the p-values are on opposite sides of 0.05, they lead to quite different conclusions and, therefore, the approximation is not adequate. Comment on this statement.
Describe a sampling strategy to randomly select those to be searched.- Explain how you would use a random number table to select the coach passengers to be searched.
State your conclusion about the effectiveness of ginkgo biloba.- Proponents of ginkgo biloba continue to insist that it works. What type of error do they claim your conclusion makes? Explain.
Major hirings in retail in Britain are as follows: 9,000 at Safeway; 5,000 at Boots; 3,400 at Debenhams; and 1,700 at Marks and Spencer.
the equation for a regression line predicting the numbers of hours of tv watched by children y from the number of hours
State the hypotheses for a right-tailed test. Obtain a test statistic and p-value assuming unequal variances. Why might the sample data not follow a normal, bell-shaped curve? If not, how might this affect your conclusions?
An ad for flights to Palm Springs, California, claims that "the average temperature (in Fahrenheit) on Christmas Day in Palm Springs is 56º."
A company that sells products through mail-order catalogs wants to evaluate whether the mean sales for their most recent catalog
What purpose does a multiple regression analysis serve? Give an example of how it might be used in marketing research.
The general social survey is an annual survey given to about 1,500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe the respondents' views of employment.
If the following expression (5t+5)/(2t+5) is to make sense, the values that t can take must be restricted. State the restriction on it.
Suppose that a company claims that their mean weekly sales are $12,250. A random sample 35 weeks yields a sample mean of with a sample standard deviation of s=$1250.
On a table there is a double-headed coin and there is a fair coin. One of them was randomly chosen and tossed, and the outcome was a head. What is the probability that the lower side of this coin is a tail?
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