You Plan to Conduct a Study Where Your Nondirectional Hypothesis

question 25

Multiple Choice

You plan to conduct a study where your nondirectional hypothesis will be assessed with a t test for independent means at the .05 significance level.If you are predicting a large effect size,how many participants would you need in total (assuming equal Ns per group) to obtain 80% power?

• A)20
• B)26
• C)40
• D)52

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Definitions:

Alcohol-based Rub

A disinfectant preparation for hands that contains alcohol, used to prevent infection by killing bacteria and viruses.

Medical Asepsis

Practices aimed at reducing the number and transmission of pathogens to prevent infections, often through sterilization and disinfection methods.

Skin Protectant

A substance applied to the skin to prevent irritation, damage from external factors, or to aid in healing, offering a barrier of protection.

Petroleum-based Product

A product derived from refining crude oil, such as gasoline, plastics, or synthetic fabrics.