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Stat 217 Investigation 7

Stat 217 Investigation 7 - Joe Cremen Stats 217 Dr Soy...

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Joe Cremen Stats 217 Dr. Soy Investigation 7 1. a. Observational units: near sighted and not near sighted children b. Variable(s): whether the child is near sighted or not (categorical- explanatory). Whether the child slept in the dark or a room with a night light or room light (categorical- response). c. Observational study. There are no variables being manipulated in this study. The researchers are simply asking and recording questions given to the parents. d. Proportion of near sightedness in darkness: 0.104 Proportion of near sightedness in light room: 0.388 e. f. Yes. Based on the segmented bar-chart it looks as if there is evidence that indicates an association between child’s room lighting and child’s eye sight. It appears there is a much higher percentage of near-sighted children that had a room light compared to children that slept in the dark. g. Ho: There is no association between childrens’ eye sight that sleep in the dark compared to childrens’ eye sight that have a light room or a night light.
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