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42 Cards in this Set
- Front
- Back
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A set of procedures used to analyze data
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Statistics
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The actual result at the end of the procedure
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Statistic
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Summarize, organize, and simplify data
Assign numbers to answers to better organize data |
Descriptive Statistics
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A small percentage you are interested in
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Inferential Statistics
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Measurements or observations
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Data
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Collection of information (all data)
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Data Set
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The group of all people of interest
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Population
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A representative group (that represents a larger group)
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Sample
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Characteristics or conditions that change and have different values for different people
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Variable
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The variable that receives treatment or changed in some way
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Independent Variable
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The variable that is measured
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Dependent Variable
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Anticipated outcome of the study
What you think will happen ****Theory**** |
Hypothesis
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Score
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X
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a.)Number of scores (population)
b.) Number of scores (sample) |
a.) N
b.) n |
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Summation
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Σ
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Using 2, 4, 4, 5, solve.
ΣX = ? |
ΣX = 15
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Using 2, 4, 4, 5, solve.
(ΣX) + 2 = ? |
Σ (15) + 2 = 17
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Using 2, 4, 4, 5, solve.
Σ (X + 2) = ? |
Σ (2+2)+(4+2)+(4+2)+(5+2)
(4) + (6) + (6) + (7) = 23 |
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Using 2, 4, 4, 5, solve.
(ΣX)^2 = ? |
Σ (15)^2 = 225
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Using 2, 4, 4, 5, solve.
Σ (X^2) = ? |
Σ (2^2)+(4^2)+(4^2)+(5^2)
(4) + (8) + (8) + (25) = 61 |
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The most frequently occuring X (score)
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Mode
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Divides exactly in half
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Median
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Average
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Mean
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Solve for 2, 4, 4, 5.
a.) Mode b.) Median c.) Mean |
a.) 4
b.) 4 c.) 3.5 |
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Solve for 2, 4, 4, 5, 5, 6.
a.) Mode b.) Median c.) Mean |
a.) 4, 5
b.) 4.5 c.) 4.33 |
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Steps to solve.
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1.) Rank Order
2.) ΣX 3.) N |
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How many times each number appears in the data set
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Frequency (f)
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what proportion represented by each score
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Proportion (p)
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What is the other information also used in the histogram?
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Percentage (%)
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Distance between the highest score and the lowest score
Highest - Lowest |
Range
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Locate P50, think of them as two datasets
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Interquartile Range (IQR)
Semi-Interquartile Range (SemiIQR) |
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Named categories in no particular order (ex. Eyes color : green, blue, brown)
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Nominal (MODE)
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Ranked Data (ex. 1st, 2nd, 3rd)
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Ordinal (MODE, MEDIAN)
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Equal Between NO TRUE ZERO
(ex. IQ, temperature) Add & Subtract |
Interval(MODE, MEDIAN, MEAN)
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Equal Intervals; TRUE ZERO
(ex. $0 in bank account or pocket) Add, Subtract, Multiply, & Divide |
Ratio(MODE, MEDIAN, MEAN)
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Used in most research, assign or code numbers to your data, and then use statistical analysis
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Quanitive Data
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More Narrative Data
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Qualitive Data
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Histogram info
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X f p %
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*
* * * * 1 2 3 4 5 |
Symmetrical
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*
* * * * 1 2 3 4 5 |
Postively skewed
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* *
* * * 1 2 3 4 5 |
Negatively skewed
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Info for graph
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F
r e q S c o r e s |
