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The following data are from two separate samples. Does it appear that these two samples came from the same population or from two different populations? Use an F max test to determine whether there is evidence for a significant difference between the two population variances. Use the 0.05 level of significance.
Use an independent measures t test to determine whether there is evidence for a significant difference between the two population means. Use alpha = 0.05.
sample 1 sample 2
n=10 n=10
M=32 M=18
SS=890 SS=550
Construct a probability for the number of students in the sample who watch soap operas.
Create the indicated confidence interval for population mean µ using a t- distribution.
Markets can be segmented by the following variables: geographic, demographic, social, or behavior. If you were to select a segmentation variable suited best for the motorcycle market, which variable would you select?
Test the hypothesis that there is no difference in the mean scores of Exam 1 and Exam 2 against the alternative that the average is greater for the second exam.
According to the National Football League, the average salary for players for the 2010 season was about $1.9 million while the median salary is around $770,000. Why are both numbers reported? What might the difference between the two statistics me..
You manufacture and sell an iron rod whose electrical conductivity is supposed to be 10.1. You plan to make 6 measurements of the conductivity of a rod you plan to sell.
The following study was developed by Economist Simon Fass. Fass surveyed a sample population of low-income households in St. Martin. The variables analyzed were monthly income per adult and choice of rental contract for housing.
Can you please derive the mean and variance of a RV X, which has a Poisson distribution.
Over the past few years, banks have strongly promoted online banking and the paying of bills online. In 2003, about 50% of internet users paid bills online.
Which measure of association would the researcher use to compare the relationship between the IV and DV? Why?
What happens to the confidence interval and the power of the test at a particular point of interest
Calculate the mean and standard deviation of the following data sets, then produce a five number summary and box plot of data.
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