A Researcher Wants to Investigate Whether Different Forms of Exercise

question 73

Multiple Choice

A researcher wants to investigate whether different forms of exercise can be used to help hyperactive children.A group of 90 children is divided into two groups according to age - those aged 9-12 and those aged 5-9.Within each age group the children are randomly assigned to one of three groups.The first group will just do their normal exercise.The second group will be given an additional exercise routine (moderate) .The third group will be given an additional exercise routine (strenuous) .At the end of a four-month period,parents will be asked to evaluate their children's progress.Identify the factor(s) and any blocking variables and the number of levels for each.

• A)Factor: exercise (3 levels),Blocking variable: age (2 levels)
• B)Blocking variable: exercise (3 levels),Factor: age (2 levels)
• C)Factor: exercise (3 levels),Factor: age (2 levels)
• D)Normal exercise and age 5-9,additional exercise (moderate)and age 5-9,additional exercise (strenuous)and age 5-9,normal exercise and age 9-12,additional exercise (moderate)and age 9-12,additional exercise (strenuous)and age 9-12 (6 levels)
• E)Factor: Normal exercise,additional exercise (moderate),additional exercise (strenuous)(3 levels)

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Definitions:

LEO

Low Earth Orbit, an orbit around Earth at an altitude between about 160 kilometers and 2,000 kilometers, commonly used for satellites, including those for communication and earth observation.

MEO

Medium Earth Orbit, a term used in satellite communications to describe the orbit of satellites located approximately 2,000 to 35,786 kilometers above the earth's surface.

GPS System

Global Positioning System, a satellite-based navigation system used to determine the precise location of an object or person on Earth.

GEO

Geostationary Earth Orbit, a type of orbit around the Earth that allows satellites to appear stationary relative to a position on the Earth.