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Definition
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Definition
| sum of the scores divided by the number of scores |
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Term
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Definition
| middle of the ordered scores, and is symbolized as X50 |
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Term
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Definition
| (N+1)/2 and is used to find the median. |
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| X1=4, X2=1, X3=7 (Find Median thru Median Position) |
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Definition
then N=3.
Median position is (3+1)/2 = 4/2 = 2.
Place the scores in order, 1 4 7.
X50 is the score in position/rank 2.
So X50 = 4. |
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Term
| X1=4, X2=1, X3=7, X4=6 Find Median Position and Median |
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Definition
N=4.
Median position is (N+1)/2 = (4+1)/2 = 5/2 = 2.5.
Place the scores in order, 1 4 6 7.
X50 is the score in position/rank 2.5.
So X50 = (4+6)/2 = 10/2 = 5. |
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Term
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Definition
Depends on only one or two middle values.
For quantitative data when distribution is skewed.
Minimizes |X-X50|. |
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Term
| What Is (Are) Statistics? |
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Definition
A collection of numerical facts
A set of methods for dealing with numerical facts
An estimate of a parameter. |
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Term
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Definition
Descriptive statistics
Inferential statistics |
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Term
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Definition
Nominal Scales
Ordinal Scales
Interval Scales
Ratio Scales |
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Term
| Values in a nominal scale are ______. |
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Definition
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Term
| Qualitative Scale is _____. |
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Definition
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Term
| Categorical Scale is ____ Scale. |
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Definition
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Term
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Definition
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Term
| when the different values of a scale can be placed in order this is a ______ scale. |
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Definition
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Term
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Definition
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Term
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Definition
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| Variable that has no set point. |
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Definition
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Term
| Variable that has a definite number. |
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Definition
| Discrete Variable. Family Size |
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Term
| Collection of all people that could be measured. |
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Definition
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Term
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Definition
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Term
| IV causes the DV. WHat type of relationship |
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Definition
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Term
| manipulation of the IV is key in _____ relationship. |
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Definition
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Term
| a variable that can be used to predict the value of another variable |
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Definition
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Term
| variable being predicted. It is the dependent variable |
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Definition
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Term
| variables other than the independent variable that may bear any effect on the behavior of the subject being studied. |
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Definition
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Term
PV predicts the CV
Key is no manipulation |
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Definition
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Term
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Definition
True Experiment
Observation (Correlational) Research |
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Term
| Observation (Correlational) Research |
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Definition
No manipulation
Minimal control over EV
Predictive relationship between PV and CV |
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Term
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Definition
Manipulation of IV
Randomization of subjects to groups
Casual relationship between IV and DV |
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Term
| What are the two requirements of a true experiment? |
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Definition
Manipulation of IV
Randomization of subjects to groups
Casual relationship between IV and DV |
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Term
| Another name for “spread” is _________?? |
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Definition
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Term
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Definition
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Definition
| Distance between datapoint 25% and 75% |
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Term
| Always a whole number is _____. |
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Definition
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Term
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Definition
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Term
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Definition
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Term
| s* = Sample Standard Deviation |
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Definition
| s* = Sample Standard Deviation |
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Term
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Definition
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Term
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Definition
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Term
| Unbiased Variance Estimate (s²) Computational Formula |
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Definition
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Term
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Definition
number of units. i.e. 1 3 5 7
n = 4 |
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Term
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Definition
| each number sqaured individually. |
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Term
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Definition
| all values added together and then squared. 1 3 5 = 9² = 81 |
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| Unbiased Variance Estimate, s² |
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Definition
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Definition
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