Oneway ANOVA bacteria example

Oneway ANOVA bacteria example

Please use the data file above to perform a Oneway ANOVA on the data. Run a post-hoc test and report the results in APA style including the F-statistic, means for each group, and any significant differences based on the post hoc. Indicate the most effective method, including means and SDs as well as your F-statistic, df, and p-value, in your brief write-up.

Virus, Bacteria, Germs, Microbiology

Here is the study description: A student investigated just how effective washing with soap is in eliminating bacteria. To do this she tested four different methods—washing with water only, washing with regular soap, washing with antibacterial soap (ABS), and spraying hands with antibacterial spray (AS) (containing 65% ethanol as an active ingredient). Her experiment consisted of one experimental factor, the washing Method, at four levels. She suspected that the number of bacteria on her hands before washing might vary considerably from day to day. To help even out the effects of those changes, she generated random numbers to determine the order of the four treatments. Each morning, she washed her hands according to the treatment randomly chosen. Then she placed her right hand on a sterile media plate designed to encourage bacteria growth. She incubated each plate for 2 days at 36°C, after which she counted the bacteria colonies. She replicated this procedure 8 times for each of the four treatments. While the researcher performed many trials, please note that the individual measures are the "participants" in the study. Therefore, n = 8 in each of 4 conditions, or a total of n=32 with four independent conditions. Submit this assignment to the "Oneway ANOVA assignment" drop box.