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The test scores for selected samples of sociology students who took the course from three different instructors are shown below.
Instructor A Instructor B Instructor C
83 90 85
60 55 90
80 84 90
85 91 95
71 85 80
At a = 0.05, test to see if there is a significant difference among the averages of the three groups.
Assume a data set is normally distributed with mean 160 and standard deviation 25. If the data set contains 300 data values, approximately how many of the data values will fall within the range 110 to 210?
A company's stock price rose 362.7% in 2004, but dropped 78.0 in 2005. a. Compute the geometric mean rate of return for the two year period 2004-2005. (Hint: Denote a decrease of 78.0% by -0.78) b. If someone purchased $1,000 of the company's stock..
1) Gather preliminary data about HIV/ AIDS in ruralcommunities in South Africa. Use the Centers for Disease Control and Prevention website (www.CDC.gov) and the National Census website.2) Use the data sets available for download to analyze them accor..
Observed Treatment Success
Find the following area under the standard normal curve: to the right of z = 2.20; ie, P(z > 2.20) = ?
question 1 a package delivery service claims that no more than 5 percent of all packages arrive at the address late.
use the table below for questions 1-4.cust idorder idshipping costdelivery methoddelivery time hrscustomer
Ebola Test Kit Evaluation
single sample hypothesis testing z-tests1. for the population at large test scores on the wechsler intelligence scale
Describe the population of interest for the survey
Identify the type of study proposed and indicate its specific strengths and weaknesses and
Describe the error in the conclusion
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