A Researcher in Interested in Whether High School Students Who $\sigma$

question 40

Multiple Choice

A researcher in interested in whether high school students who play sports have a higher or lower body mass index (BMI) than students in the general population.The researcher is unsure whether playing sports will decrease body mass (due to more calories burned) or increase body mass (due to more muscle mass) .The researcher selects a sample of 60 athletes and finds that their average BMI is 22.The average (µ) in the general population of students is 22.5 with a standard deviation ( $\sigma$ ) of 3.What is z_obt for this sample?

• A).98
• B)1.29
• C)1.96
• D)2.25

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Definitions:

Proposition

A proclamation or assertion signaling an assessment or belief.

Obverse

The statement formed by negating both the subject and predicate of a given categorical proposition and changing the quality of the original proposition (from affirmative to negative or vice versa).

Proposition

A statement or assertion that expresses a judgment or opinion, which can be evaluated as true or false.

Obverse

The opposite or counterpart of a given statement, often involving negation.