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Researchers use single factor experimental designs to try to study causal relationships. For example, if researchers want to know if an exercise intervention reduces depression, they might randomly assign some participants to receive the exercise intervention and others to not. They could collect baseline and post-intervention data and compare the two groups. If the treatment group showed a significantly greater reduction of depression than the control group, the researchers would conclude that the exercise intervention reduced depression.
Think of a topic of interest.
1. Create a research question and hypothesis.
2. Summarize how you would construct a study to test your hypothesis.
3. Discuss if you want to study this using a between subjects or within subjects design? Explain.
4. Discuss if you want to use random assignment or random sampling. Explain why or why not.
How many gallon are added to the tank during the first ten mintutes? Round your answer wih two digits on the right side of decimal point.
2. The balance A (in dollars) in a savings account is given by A = 8000e0.09t, where t is measured in years. Find the rate at which the balance is changing when t = 1 year, t = 10 years,and t = 50 years. (Round your answers to two decimal places.)
A 65.0 silver object and a 70.0 gold object are both added to 45.5 of water contained in a graduated cylinder. What is the new water level in the cylinder?
the following data list worldwide shipments of personal computers in thousands according to dataquest.year shipments in
Students receive scores rounded to the nearest 10. What is the interval of student scores that lie within one standard deviation of the mean?
Find the slope of this curve where it meets the right pole.
Child lies on the the ground and looks up at the top of a 17 foot tall tree nearby. Child is 14 feet away from the tree what is the angle of elevation to the top of the tree?
determine the extreme value of f(x,y) on 0
a paper cup is to be constructed in the shape of a right circular cone. if the volume desired is 36pie in^3, find the dimensions that require the least amount of paper. (disregard any waste that may occur in construction).
Construct a tree diagram and list the sample space.
what is the compound amount on $1000 invested for 2.5 years at 6% compounded monthly?
Assume pay grade A has a 30% range spread with a midpoint of $30,000 and pay grade B has a 40% range spread with a midpoint of $40,000. Calculate the pay range overlap for these two pay grades
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