We tested the effect of two drugs, ethanol (treatment A) and caffeine (treatment B), on the nematode, Caenorhabditis elegans.
Pages 278-280 in the lab manual https://www.icloud.com/iclouddrive/01d_ZVIbjlxcMbHJr2wp3AZ4Q#BioLabiBook offer some explanation of confidence intervals and how to interpret them. There is also a video that demonstrates how to graph and interpret confidence intervals for your assignment.
Please download the excel sheet with the class data: Key – C. elegans.xlsx
Follow along in the excel sheet to calculate averages, standard deviation, and confidence intervals.
Graph the averages along with their confidence intervals.
Then, answer the following questions in a text box on your excel sheet:
What was your hypothesis?
Does the data support your hypothesis? In other words, what were the results of the experiment? To answer this, look at your graph. Is there a significant difference between Drug A and Drug B (do the confidence intervals overlap or not overlap)? Did Drug A have a significant effect? Did Drug B have a significant effect? (Do the confidence intervals extend past 0 or not?)
If the data does not show significance, why might this be? Was our sample size too small? Did we have trouble consistently counting wiggles?