An Experiment to Determine the Efficacy of Using 95% Ethanol

question 94

Short Answer

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.

---

Definitions:

Economic Freedom

The condition in which individuals and businesses have autonomy in economic activities, including trade, investment, and labor decisions, with minimal government intervention.

Segregated Schools

Educational institutions that were divided based on racial or ethnic lines, a practice particularly prevalent in the United States before the Civil Rights Movement.

Civil Rights Movement

A pivotal social justice movement in the United States during the 1950s and 1960s aimed at ending racial discrimination and segregation.

Sagebrush Rebellion

A political movement in the Western United States advocating for greater local control over federal lands, primarily during the late 20th century.