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Kin 175 > Ways of Describing Data > Flashcards

Ways of Describing Data Flashcards

1
Q

What is the verticle axis known as on a curve

What goes on this axis

A

Ordinate

Frequency

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2
Q

What is the horizontal axis known as on a curve

What goes on this axis

A

Abscissa

Scores

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3
Q

What is a normal curve

What measure is expressed for central tendency in this curve

A

Bisymmetrical
50% on each side

Average
Standard deviation

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4
Q

What is a skewed curve

What measure is expressed for central tendency in this curve

A

More dense on one side
Can be positive or negative

Median
SID

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5
Q

Positive skewed curve is when

A

Higher density on lower values

Mean is overestimated

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6
Q

Negative skewed curve is when

A

Higher density on higher values

Mean is Underestimated

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7
Q

Leptokurtic curve is when

A

Many people scored the same score

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8
Q

Platykurtic curve is when

A

Lots of scores have the same frequency

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9
Q

Central tendency is where

A

Scores of distribution tend to cluster

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10
Q

What are the 3 measures of central tendency

A

Mode
Median
Mean

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11
Q

What is the mode

What is it affected by

A

Most frequent occuring score

Affected by a single change to the scores in the distribution

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12
Q

What is the median

It is based on…

What is it affected by

What measurement scale does it use

A

50th percentile score

Where 50% of the group falls below or above

Based on the NUMBER of scores not VALUE

Affected by a single change in a score

It uses ordinal scale of measurement

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13
Q

What is the mean

What score is it represented by

A

Average score
Best measure of central tendency for normal curves

Represented by continuous scale

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14
Q

Variability means

A

Spread of scores

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15
Q

3 measures of variability

A

Range
SID
SD

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16
Q

What is the range associated with and reported with

A

Mode

17
Q

What is the SID associated and reported with

A

Median

18
Q

What is the SD associated and reported with

A

Mean

19
Q

Always report a measure of variability with…

A

A measure of central tendency (mode, median or mean)

20
Q

A measure of central tendency is more fully understood if reported with….

Why

A

A measure of variability

Because data sets can have same mode, median or mean but show complete different variation

21
Q

Homogeneity for variability is

Heterogeneous

A

Is when the variability is consistent

Is when the variability is different

22
Q

Range is a measure of…

Reported with…

Provides description of…

What is the problem

A

Variability

Mode

Provides total spread of scores

a change in one score can change the range of scores

23
Q

SID is reported with

Provides a measure of…

Problems are

A

Median

Variability for the middle 50% of the scores

If homogeneity or heterogenity are common in the extremes then they will not be represented

24
Q

SD measures…

Reported with…

Shows…

A

Variability

Mean

Shows the deviation of an entire set of scores

25
Q

Variance is a measure of…

How is it found

A

Variability

By SD^2

26
Q

What is between subject variability mean

A

Difference between each subject scores

27
Q

What is within subject variability

A

The difference in scores within the same subject but different tests

28
Q

Median you use the…

While Mean you use the…

A

Frequency

Values

29
Q

The mean is considered…

As it uses…

Is used for….

Variability that is represented with it is….

Researchers like it because…

A

Continuous

Values

Normal curve

SD

Use the mean for more statistics

30
Q

The median is considered…

As it uses…

Is used for…

Variability that is represented with it is….

A

Ordinal (due to ranking)

Frequency

Skewed curves

SID

31
Q

What is norm referenced standards used for

Why

A

Percentile rank

Gives motivation

32
Q

What is criterion referenced standards used for

Why

A

Pass or Fail

Set of criteria that is used to see whether pass or fail

Kin 175 (5 decks)

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