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A researcher tests how well participants know their spouse while under hypnosis, and again without hypnosis. The mean difference score between correct responses under hypnosis and without hypnosis was MD = 3.80 in a sample of 24 participants. If the estimated standard error for difference scores was 2.94, then what is the decision at a .05 level of significance (two-tailed test)?
A researcher wants to know if elderly people who own dogs are equally as likely to pay visits to their doctors than those who do not own dogs.
Two variables, Variable X and Variable Y, are the focus of a study. The study involves 25 research participants. The sum of the cross products
the pew research center reports that the mean student loan amount in 2008 was 15425 for students obtaining a bachelors
Exposure to Exchange Rates McCanna Corp., a U.S. firm, has a French subsidiary that produces wine and exports to various European countries. All of the countries where it sells its wine use the euro as their currency, which is the same currency u..
Let's take dominance to mean 50% ownership, and suppose that a random sample of 700 VW shareholders reveals that 220 of them own Porsche shares. Conduct the left-tailed test aimed at proving that Porsche shareholders are not dominant. What is the ..
What is a hypothesis? What is the distinction between a hypothesis and a prediction?- What information does the researcher communicate in each of the sections of a research article?
(a) Calculate the expected value of the amount that player A will get.
Let p(x) = x5 + 8x4 - 30x3 + 30x2 - 31x + 22. What is the relationship between p(x) and f(x)=5x4 + 32x3 - 90x2 + 60x - 31?
if the standard deviation for a population as estimated from a sample is s 5.6 then the standard error for a sample
Nicotine patches are often used to help smokers quit. Does giving medicine to fight depression also help? A randomized double blind experiment assigned 244 smokers to receive nicotine patches and another 245 to receive both a patch and the antidep..
a companys manufacturing process uses 500 gallons of water at a time. a scrubbing machine then removes most of a
An investigator wants to design a study to estimate the difference in the mean BMI between boys and girls age 12 living in new york city. How many boys and girls are needed to ensure 95% confidence interval estimate for the difference in mean BMI ..
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