Fidan Is Studying a Model of Obesity

question 54

Multiple Choice

Fidan is studying a model of obesity. For her experiment, Fidan uses three groups of 31 rats each that are given either (1) 24-hour access to high calorie treat food in addition to their normal chow, (2) restricted 8-hour access to high calorie treat food and 24-hour access to their normal chow, or (3) 24-hour access to only their normal chow. Every day, Fidan weighs the animals and carefully takes note of the amount and type of food each animal has consumed. At the end of the experiment, Fidan performs surgery on all the animals and notices that the animals that put on the most weight showed noticeable differences in their hypothalamus compared to the rest of the rats.
-Which of the following represents the median weight of all the rats in Fidan's experiment

• A) The weight that the most rats had at the end of the experiment.
• B) The weight of the heaviest rat at the end of the experiment.
• C) The weight of the 47th heaviest rat at the end of the experiment.
• D) The weight that was equal to the central point of the weight distribution.

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Definitions:

Control Limits

Statistical boundaries set in quality control processes to identify when a process is out of control, based on specifications or historical performance data.

Upper Control Limit

The highest value a process variable can reach before it is considered to be out of control in a statistical quality control chart.

Sample Proportion

The ratio of members within a sample that have a particular attribute to the total number of members in the sample.

Level Shift

A sudden change in the baseline level of a time series dataset.