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Suppose that the researchers who carried out the experiment described in the previous exercise thought that gender might be a potentially confounding variable. If 700 of the children participating in the experiment were girls and 630 were boys, describe how blocking could be incorporated into the experiment. Be specific about how you would assign the children to treatment groups.
you are considering two projects that are not mutually exclusive the espresso project and the herbal tea project. the
What is the mean and standard deviation of the flow time? What is the probability that the total time will be less than 920 seconds?
Suppose instead that you estimate the terminal value of the company using a PE mul- tiple. The industry PE multiple is 11.
a tool-crib with one attendant serves a group of 10 mechanics. mechanics work for an exponentially distributed amount
Among those who smoked, what percentage has ever been divorced? Is this value a row percentage or a column percentage?
the total number of cars and light-duty trucks sold in 2013 was 2.234 million while 1.346 million were sold in 2009.
The American Automobile Association checks the prices of gasoline before many holiday weekends.
What is a sampling distribution and what does it show - what is the difference between a parameter and a statistic and how do they relate to each other?
30% of households say they would feel secure if they had $50,000 in savings. you randomly select 8 households and ask them if they would feel secure if they had $50,000 in savings. find the probability that the number that say they would feel secu..
a sample of 9 quiz scores had a mean of 15.2 and a sample standard deviation of s 3.3. if it is known that the quiz
he difference in the percentage of participants who quit (20% versus 46%) was statistically significant. What conclusion can be made on the basis of this study?
As part of this trial, they want to find out whether there is a difference between effectiveness for women and for men. At = .05, what is the test value?
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