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Let's test the hypothesis that age differs with class rank. Using the students in our class as a sample: The age for the 74 Junior students has a mean of 21.24 and a standard deviation of 1.629.
The age for 65 Senior students has a mean of 22.9 and a standard deviation of 3.4843.
Use alpha = 0.01.
1.What is the effect size (Cohen's d)?
2.How would you describe the size of this effect?
3. Use the power curves, the Excel calculator, or R to calculate the observed power of this test
4.Suppose you conduct a t-test and get a p-value exactly equal to α = .05, What is your observed value of t compared to the critical value of t?
5.What is the observed power of this test?
Do we have a moral duty to obey the state and follow its laws? Why or why not?
What is the minimum mean score that you could have after the next? quiz? If you get a score of 100 on the next? quiz, your new mean would be 105
Do all three prototypes have the same average range? Construct an ANOVA table, and carry out the test. Explain your results.
As a percentage of an arbitrary starting amount, about how large would transaction costs have to be to make triangular arbitrage between the exchange rates
Conduct a frequency analysis on the gender and marital status variables - create a frequency table to summarize the data on the educational level variable.
Why is it important for closing a risk event, should a PM benefit from closing these risk events.
Use the confidence level and sample data to find a confidence interval for estimating the population mean m.
A book can be classified as either non dash fiction or fiction. Suppose that 97?% of books are classified as fiction.
a random sample of 21 ncaa division i mens basketball games during the 2009-2010 season had an average attendance of
Line #1 ____ the OLS regression line of x on y, and Line #2 ____ the OLS regression line of x on y.
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
Suppose that you're the Quality Manager for the Emerson D. Meritz Machine Tool Company. Your model IE566 grinding machine is afflicted by three types of defects classified as major (type A), serious (type B) and minor (type C).
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