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A histogram showing the different responses from five groups of government employees is used in a report to emphasize the different results. A group accounted for 60% of the response, another 20%. Is this an appropriate method to show the results or would you recommend an alternative?
Securities Exchange Commission (SEC) was $22,500, with a standard deviation of $7,500. The SEC overseers want to draw a sample of 100 accounts to help assess the impact of the fund's freeze on the account holders.
question an electronics company wants to compare the quality of their cell phones to the cell phones from three
Suppose you have drawn a simple random sample of 400 business executives. In this sample, 150 executives owned Blackberries.
in a survey 427 different women are randomly selected without replacement and each woman is asked what she purchased
a random sample of n 400 measurements is drawn from a binomial population with probability of success .21. give the
What are the assumptions that must be met for non-parametric statistics? What are the positives and the negatives of the chi-square test?
The United States Postal Service reports that 95 percent of first class mail within the same city is delivered within two days of the time of mailing. Six of the letters are randomly sent to different locations.
at a community college it is known that the grade point average gpa of all students has a distribution which is both
Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Here are data on the "penetrability" of the same type of soil at 2 levels of compression.
fitting of simple linear regression equation.a researcher wishes to determine whether a persons age is related to the
Calculate the p- value and use it to test H0 versus H a at each of a .10, .05, .01, and .001. d How much evidence is there that the mean composite satisfaction rating exceeds 42?
Suppose for a particular set of data r = 0.889, ybar = 5.5, n = 15 and the equation for the regression line is yhat = 3.5 + 2.5x. Find the best-predicted value of y given that x = 2.0.
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