In a study of the lizard Sceloporus occidentalis, researchers examined field-caught lizards for infection by the malarial parasite Plasmodium. To help assess the ecological impact of malarial infection, the researchers tested 15 infected and 15 uninfected lizards for stamina, as indicated by the distance each animal could run in 2 minutes. The distances (in meters) are shown in the data set Plasmodium.txt, which can be imported using the code (Remember if you copy paste this that you may need to change the quotes!):

P=read.csv('https://www.dropbox.com/s/shsua29ybgoxqtf/Plasmodium.txt?dl=1',header=T,sep=',')

The researchers think the average distance ran by the infected lizards differs from those uninfected by Plasmodium. They wish you to conduct: A test to prove their theory. They also want you to get some kind of measure of how different the average run times are for the infected versus the uninfected. For this they want to be 98% confident for the measured distance.

What type of test are we using on Rstudio to solve this problem