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Presentation Of Quantitative Data Flashcards

(5 cards)

1
Q

Bar charts

A

Type of graph where the frequency of each variable is represented by the height of bars

  • used when data is divided into categories e.g. discrete data
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2
Q

Histograms

A

Type of graph that shows frequency but the area of the bars represents a frequency

  • x axis starts at true zero and the scale is continuous
  • continuous data shown, one category shown
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3
Q

Scattergram

A

A type of graph that represents the strength and direction of the relationship between variables in correlational analysis

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4
Q

Normal distribution

A

Symmetrical spread of frequency of data that forms a bell shaped curve; the mean, median, mode all located at the highest peak

  • most people are located in the middle, with few people at the extreme ends
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5
Q

Skewed distributions

A

Skewed = spread of frequency data that is not symmetrical and the data clusters towards one end

Positive skew = the long tail is is on the positive right side of the peak, most of the distribution is on the left
- extremes in data, pull the mean to the right

Negative skew = the long tail is on the negative left side of the peak, most of the distribution is on the right
- the mean is pulled to the left

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