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Research Methods and Data Analysis > Histograms, Central Tendency, Spread, Shape > Flashcards

Histograms, Central Tendency, Spread, Shape Flashcards

1
Q

What is the mode?

A

Nominal and Ordinal (can be used in all)

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2
Q

What are histograms?

A

Visualises how data is distributed
Quantitively describe the distribution

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3
Q

What is the median?

A

Only obtained in ordered variables
Ordinal, Interval, Ratio

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4
Q

What is the mean?

A

Interval and Ratio variables
Extreme outlier will effect the mean

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5
Q

What is involved when looking at central tendency?

A

Mode
Median
Mean

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6
Q

How many sections are in a quartile?

A

4

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7
Q

How many sections are in percentiles?

A

100

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8
Q

When spreading data, what does this involve?

A

Quantiles, Quartiles, Percentiles
Standard deviation and Mean

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9
Q

What is standard deviation?

A

The square root of the variance
“Standard distance from the mean”

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10
Q

What is mean standard deviation?

A

Provides information where the centre is and how spread data points are around it

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11
Q

What is the Z score?

A

A ratio with respect to SD
Enables fair comparison of deviations

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12
Q

What are the 2 types of shapes of graph?

A

Kurtosis
Skewness

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13
Q

What does skewness measure?

A

Measure the degree of asymmetry
3rd moment

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14
Q

What does positive/negative skewness mean?

A

The direction which data is skewed

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15
Q

What are the different types of shape?

A

Skewness
Kurtosis

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16
Q

What does positive skewness indicate?

A

Distribution is highly asymmetrical

17
Q

What does kurtosis measure?

A

Sharpness
4th Moment

18
Q

What direction is kurtosis always?

A

Positive

19
Q

What is excess kurtosis?

A

The subtraction of of normal distribution to kurtosis

20
Q

What are the different moments around the mean?

A

1) Balanced distances
2) Variance= Spread
3) Skewness= Skewed/Distorted
4) Kurtosis= How thin

Research Methods and Data Analysis (17 decks)

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