A Researcher,based on Her Review of Relevant Scientific Studies,believes That

question 75

Multiple Choice

A researcher,based on her review of relevant scientific studies,believes that there is a relationship between the frequency of a baby's crying and whether it was nursed at set intervals or on a demand schedule.If this belief were tested by experimentally manipulating feeding schedules,the feeding schedule would be called the:

• A)independent variable.
• B)dependent variable.
• C)extraneous variable.
• D)control factors.

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Definitions:

Modal Class

The category or interval in a set of data with the highest frequency, often used in analyzing categorical or grouped numerical data.

Histogram

A graphical representation of data using bars of different heights, where each bar groups numbers into ranges, showing the frequency of data within each range.

Observations

Individual pieces of data collected during a study or experiment.

Relative Frequencies

The ratio of the number of times a particular value occurs to the total number of observations, often expressed as a percentage.