Two-Sample T Procedure Essay

The two-sample t procedure is appropriate to use in this experiment in order to see if there is a difference in the two

population means of stride length in the two different species, N. rattus and N. squamipes. This is because the boxplots

appear to be roughly symmetrical, as well as, both normal quantile-quantile plots look roughly linear. Considering

two-sample t-procedures are quite robust to violations of the normality assumption, the t-procedure will likely

perform well in this scenario. It is important to note that the second assumption of an independent simple random

sample may not be reasonable as each species of rat came from a single municipality. This may not be representative

of the entire population of the species. In spite of this, using a …show more content…
The point estimate of the true mean

difference between the lowest detectable amplitudes (post space flight sensitivity –

pre-space flight sensitivity) is 33.866 micrometers. This provides evidence that

astronauts’ foot sole skin becomes hyposensitive following space shuttle missions.

We can be 95% confident that the true mean difference in the lowest detectable

amplitude of a 25 Hz frequency on the big toe of an astronaut before and after a

space shuttle mission (after-before), under the conditions of this study, lies between

5.094012 and 62.637988 micrometers. On average, the sensitivity of astronauts’

foot sole skin post space flight is less than before the space flight. It is important to

note that since this entire interval is to the left of 0, we can reject the null