Data Analysis: Graphs Flashcards

1
Q

What are the types of ways to present and display quantitative data?

A
  • Tables
  • Bar charts
  • Histograms
  • Line graph
  • Scattergram
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2
Q

What is a table?

A
  • Raw score displayed in columns and rows

- Summary paragraph underneath to explain results

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3
Q

What is a bar chart?

A
  • Categories (discrete data) placed along x-axis and frequency on y-axis
  • Height of column represent frequency
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4
Q

What is a histogram?

A
  • Bars touch each other
  • Continuous data
  • True zero
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5
Q

What is line graph?

A

Frequency on one axis, data on another is continuous

-Often shows change

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6
Q

What is a scattergram?

A
  • Represent correlation analysis
  • Each dot represent one pair of related data
  • Axis must both be contentious
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7
Q

What are the two types of distributions?

A
  • Normal

- Skewed

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8
Q

What are the two different types of skewed distributions?

A
  • Negative skew

- Positive skew

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9
Q

What is normal distribution?

A
  • Symmetrical, bell-shaped curve
  • Mode, mean and median all occur at the midpoint of the curve
  • Most people in the middle
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10
Q

What is a skewed distribution ?

A

Distribution leans to one side or the other because most people are either lower or upper end of distribution

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11
Q

Describe a negative skew:

A
  • Most distribution is to the right side of the graph

- Long tail on the left

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12
Q

Out of mode, median and mean which has the highest peak in a negative skew?

A

Mode

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13
Q

Out of mode, median and mean which has the lowest peak in a negative skew?

A

Mean

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14
Q

Out of mode, median and mean which has the middle peak in a negative skew?

A

Median

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15
Q

Describe a positive skew:

A
  • Most distribution leans left side of the graph

- Long tail on the right

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16
Q

Out of mode, median and mean which has the highest peak in a positive skew?

A

Mode

17
Q

Out of mode, median and mean which has the lowest peak in a positive skew?

A

Mean

18
Q

Out of mode, median and mean which has the middle peak in a positive skew?

A

Median

19
Q

How can you remember whether a skewed distribution is negative or positively skewed?

A

With your feet

  • Negative = left (big toe = mode)
  • Positive = right (big toe = mode)