I have a computer assignment due on the SPS program, and I\'m trying to figure o

Question

I have a computer assignment due on the SPS program, and I'm trying to figure out whether I need to run a one-sample, independant saple, or paired sample t-test for this data set:

Environmental enrichment (EE) is when laboratory animals are provided with social and physical stimuli that are not typically provided within standard laboratory housing to increase psychological and physiological health. Environments that resemble impoverished conditions, such as standard housing (SH), have been suggested to lead to depression-like behavioral markers in rats, such as diminished motivation for reward and lower stress-coping abilities. Research has found that rats housed in EE had increased performance on a spatial learning test, such as the radial arm maze, as well as an increase in working memory. After exposed to an acute stressor, male rats have been shown to have impaired memory performance on the radial arm maze. The purpose of this study was to look at how stress and enrichment affected the performance of rats on a radial arm maze. To accomplish this, rats were housed in either an enriched environment, or standard housing, and then later randomly assigned to a stressed, or non-stressed condition. Animals then ran the radial arm maze for a specific 4-arm pattern. The percent of the number of arms correctly visited was recorded for six days and on the seventh day they were tested on how well they had memorized their pattern. This data set is a small selection of the data collected to see if enrichment had an effect on memory.

We want to know if our rat’s results are better than the previously found population of rats on the percent correct of arms visited on test day. Run a test to see if the sample is better than the population (=77, note that this is not a real population mean, it was only made up for the purpose of this assignment).

What type of t-test do I run and why?

Explanation / Answer

Here you need to do the one sample t-test as the null hypothesis to be tested is that the population mean is equal to 77. Also the population standard deviation is unknown.

Thanks.

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