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1. For a sample of 36 houses, what would you expect the distribution of the sale prices to be? A real-estate agent has been assigned 10 houses at random to sell his month. She wants to know whether the mean price of those houses is typical. What, if anything, does she need to assume about the distribution of prices to be able to use the Central Limit Theorem? Are those assumptions reasonable?
2. In 2008 and 2009, Systemax bought two failing electronics stores, Circuit City and CompUSA. They have kept both the names active and customers can purchase products from either webiste. If they take a random sample of a mixture of recent purchases from the two websites, the distribution of the amounts purchased will be bimodal.
a) As their sample size increases, what's the expected shape of the distribution of amounts purchased in the sample?
b) As the sample size increases, what's the expected shape of the sampling model for the mean amount purchased for the sample?
What information is provided by the numeral value of the Pearson correlation? What is the major distinction between the Pearson and Spear man correlations?
suppose we have a set of 100 x y points. if we multiply all of the xs by 10 thena. the mean and standard deviation of
This sample group has errors with a standard deviation of 54.7ft. At the 5% level of significance, test that the new population has errors with a standard deviation equal to 43.7ft.
In a sample of 64 patients, suppose that 47 showed allergic reduced reaction and 17 show increased reaction. Are these results sufficient to conclude a significant effect?
1.on november 26 1995 the minneapolis tribune ran an article on gender differences in shopping behavior. when 400 women
assume we want to use a .05 significance level to test the claim that p1ltp2. it we want to test that claim by using a
These data are presented below. Should the manager be given an increase in staff? Why or why not? Please show your work.
the personnel director of a large corporation wishes to study absenteeism among clerical workers at the corporations
data were collected on annual personal time in hours taken by a random sample of 16 women and 7 men employed by a
Describe what is measured by the estimated standard error in the bottom of the independent-measures t statistics.
Find out and interpret coefficients of correlation and determination for U. S. prices versus Canadian prices.
The defective and non defective stampins proceed from the machine on a random manner. If 4 stampings are randomly collected, find The probability that almost 2 are defective.
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