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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.).
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
The random variable x is known to be uniformly distributed between 70 and 90. The probability of x having a value between 80 to 95 is
Calculate the mean and the standard error of the sampling distribution of the sample means. Also, find the mean and standard error of the sampling distribution for samples of size 5.
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 ..
During a 52 week period, a company paid overtime wages for 18 weeks and hired temporary help for 9 weeks. During 5 weeks, the company paid overtime and hired temporary help
It was thought that hypnosis would lower a person's desire to smoke. A researcher decided to investigate this hypothesis using a paired-sample sign test in which the number of cigarettes/day smoked by subjects was recorded before and after hypnosi..
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
The ages of cars owned by all employees of a large company have a bell shaped distribution with a mean of 8 years and a standard deviation of 2 years. Using the empirical rule, find the approx. percentage of cars (owned by those employees) that are b..
When such digits are randomly generated, what is the distribution of those digits? Given such randomly generated digits, what is a test for "goodness-of-fit"?
What is the probability of obtaining 4 ones in a row when rolling a fair, six-sided die? Interpret this probability.
Determine the mean and standard error of the x - bar distribution.
Using data on average school grade for first use. Use the t test to conduct a one-tailed test of the null hypothesis, assuming that the average grade is higher for males than for females
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