Unit One Lesson 1.2 Key Words Flashcards

1
Q

What is a bar graph?

A

A graph that displays the values associated with each level of the independent variable; used in cases where the horizontal axis represents a categorical or qualitative variable

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2
Q

What is a categorical variable?

A

A variable containing categorical data

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3
Q

What is a class?

A

A range into which numerical data can be grouped

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4
Q

What are class boundaries?

A

The maximum and minimum values within each class in a histogram or frequency table

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5
Q

What is a class interval?

A

The distance between two successive class minimums in a histogram or frequency table

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6
Q

What are class limits?

A

The upper and lower boundaries of a class

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7
Q

What is a class width?

A

The distance between the maximum and minimum values of a given class in a histogram or frequency table

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8
Q

What is cumulative frequency?

A

The sum of a series of frequencies in a data set, in which the frequency from one class is added to the sum of the frequencies of all the classes below it. The addition of all frequencies in a data set will equal the total number of observations in a data set

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9
Q

What is cumulative relative frequency graph?

A

A line graph that shows cumulative frequencies on the vertical axis and data values (divided into classes) on the horizontal axis

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10
Q

What is distribution?

A

The pattern of variation in a numeric or categorical variable. Basically how frequent or repetitive the numeric or categorical variable occurs

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11
Q

What is a dot plot?

A

Displays the number of observations with a particular value; each observation is shown as a dot

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12
Q

What is frequency?

A

The number of observations within a range of data

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13
Q

What is a frequency plot?

A

A plot (or graph) that shows frequencies

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14
Q

What is a frequency table?

A

A table that shows the number of observations in each of the classes, categories, or level of a variable

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15
Q

What is a gap?

A

A class with a frequency of zeros, or no observations

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