12. A researcher at The Ohio State University believes that a certain component of ant venom can be used to lessen the amount of swelling in the knuckles of people suffering from arthritis The ant venom treatment has been made into a cream that can be rubbed on affected areas Explain how you would design an experiment to investigate whether this new treatment, when used each day for one week, causes a lower degree of swelling in arthritis sufferers. (You may suppose that 200 people suffering from arthritis have already volunteered to be experimental subjects.) Identify the explanatory variable and the response variable in your experiment

Can someone calculate this problem and explain it to me?

You are a researcher who wants to know what the mean (µ) level of anxiety would be for the whole population if they were all receiving a new anti-anxiety therapy.  You can’t give the therapy to the whole population, so you give it to a sample, and you get M = 32.1 as the average anxiety level for the sample on the therapy.  What is the reason that you can’t just simply assume that µ = 32.1? You didn’t use random assignment Sampling error Descriptive statistics Inferential statistics

A researcher would like to examine how the chemical tryptophan, contained in foods such as turkey, can affect mental alertness.  A sample of n = 9 college students is obtained and each student’s performance on a familiar video game is measured before and after eating a traditional Thanksgiving dinner including roast turkey.  The average score dropped by M = 14 points after the meal with SS = 1152 for the difference scores. A. Is there is significant difference in performance before eating versus after eating?  Use a                two-tailed test with α = .05.             SMD = ___________________________             tcritical =     ________________________             tcalculated =    ________________________                  Decision = _______________________             B. Compute r2 to measure the size of the effect.             r2  = _____________________________   C. Write a sentence demonstrating how the outcome of the test and the measure of effect                size would…