A Researcher Is Interested in Whether High School Students Who

question 10

Multiple Choice

A researcher is 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) . He compares their average BMI to that of students in the general population and finds that z_obt = +1.92. This is a _____ test and the researcher should conclude _____.​

• A)one-tailed; that students who are athletes have significantly higher BMIs.
• B)two-tailed; that students who are athletes have significantly higher BMIs.
• C)one-tailed: that students who are athletes do not have significantly higher BMIs.
• D)two-tailed: that students who are athletes do not have significantly higher BMIs.

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Definitions:

Syndrome

A collection of symptoms that consistently occur together or a condition characterized by a set of associated symptoms.

Dizygotic Twins

Also known as fraternal twins, are two offspring born from the same pregnancy but fertilized by two different eggs and thus genetically distinct.

Monozygotic Twins

Identical twins originating from a single fertilized egg, resulting in genetically identical individuals.

Genes

Units of DNA that are responsible for determining the characteristics and traits that are inherited from parents to offspring.