Asked by Daphne Scotese on Jun 26, 2024
Verified
An experiment to determine the efficacy of using 95% ethanol or 20% bleach as a disinfectant in removing bacterial and fungal contamination when culturing plant tissues was repeated 15 times for each disinfectant. The plant tissue being cultured was sweet potato: Five cuttings per plant were placed on a petri dish for each disinfectant and stored at 25 C for 4 weeks. The observation reported was the number of uncontaminated cuttings after the 4-week storage. 
a. Is it reasonable to assume that the underlying variances are equal?
______________
b. Are you willing to conclude that there is a significant difference in the mean numbers of uncontaminated eggplants for the two disinfectants tested?
t = ______________
There ______________ evidence of a difference in the mean number of uncontaminated eggplants for the two disinfectants.
Ethanol
A volatile, flammable, colorless liquid commonly used as a fuel and in chemical synthesis, and also found in alcoholic beverages.
Disinfectant
A chemical agent used to eliminate or significantly reduce the presence of pathogenic microorganisms on surfaces or objects.
Bacterial Contamination
Bacterial contamination refers to the undesirable presence of bacteria in a substance, environment, or object, which can pose health risks.
- Apply hypothesis testing to compare means from two populations.
- Assess and acquire insight into the idea of standard deviation in relation to hypothesis examination.
Verified Answer
HK
Learning Objectives
- Apply hypothesis testing to compare means from two populations.
- Assess and acquire insight into the idea of standard deviation in relation to hypothesis examination.