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A researcher is interested in whether a new teaching method influences the public speaking skills of students in an introductory to communications class. The researcher

A researcher is interested in whether a new teaching method influences the public speaking skills of students in an introductory to communications class. The researcher knows that public speaking skills in the class are normally distributed with = 10 and = 2. Which is the null hypothesis for this research study?

a.

teaching method = 10

b.

teaching method = 2

c.

teaching method 10

d.

teaching method 2

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