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Sixteen juvenile rats were treated with the drug Naloxone (pairs 1,3,7,8) or, as a placebo control, Saline (pairs 2,4,5,6) and then observed for their play and non-play behavior in an open field for 1.5 minutes. The goal of the research was to test the idea that the inhibition of endogenous opioid neuro-transmission (this is what naloxone does) will reduce play behavior, but have no effect on other social or non-social behaviors.
A) Write a research hypothesis for this experiment.
B) Write a null hypothesis for this experiment.
C) Write 1 alternative (research) hypothesis for this experiment. (Note: you cannot use a behaving that is part of your research hypothesis or null hypothesis for the alternative.).
Perform a hypothesis test by using.04 level of significance to find out if there is a difference between the population means.
A quality control engineer wants to check if a particular product meets the specification of 90% of the entire product shipped is in perfect condition. He randomly selects a sample of 10 items of the product from a large lot ready to be shipped.
The probability of contracting the kissing disease is .23 when one is exposed to a certain provocative environment. Sixty people are so exposed. What is the probability that no more than 10 are infected with this dreaded disease.
Consumers reported on average 1.7 problems per vehicle with a popular make and model of a 2006 car. We randomly select a vehicle of the same make, model, and year.
They have collected data on gender, shoe size, and height to see if they can change their business model to include only one size of shoes regardless height or gender of the wearer.
In testing the difference between two means from two independent populations, the sample sizes do not have to be equal to be able to use the Z statistic.
Provide two examples for each source of measurement error and include how each example might likely influence research results.
The scores of the GRE exam are transformed so they have a mean of 500 and standard deviation of 100. The scores are known to be normally distributed. What is the percentage of students that score below 750?
Determine the probability that tire wears out before 70,000 miles?
Construct a 90% confidence interval for the population proportion p . Does your result agree with your conclusion in part (a)?
Identify a research issue, problem, or opportunity that uses data that has absolute zero measurements, ratio level data.
Pepsi wanted to test to determine if the males preferred Pepsi more than the females. (a) PConduct the appropriate test and describe the results (ick your own alpha value)
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