Decimals
How would you round the following decimal to the second decimal place?
0.5641
0.56
What kind of scale is mutually exclusive, exhaustive, and categorical?
Nominal scales
Definition: A value around which data is clustered
Central Tendency
Kurtosis: Is the data is leptokurtic, are the values positive, negative, or normal?
Positive
What is the measure of dispersion that DOES NOT matter?
Range
How would you round the following decimal to the second decimal place?
0.8202
0.82
What scale is a numerical ranking that indicates the differences in measure?
Interval
What measure(s) of central tendency is used for nominal scales?
Mode
What is the definition of kurtosis?
A measure of how "peaked" the data is.
Definition: How "spread out" the data is
Variance
How would you round the following decimal to the second decimal place?
0.0737
0.07
What two scales are qualitative and discrete in nature?
Nominal, Ordinal
What are the permissible statistics for an ordinal scale?
Median, Mode
Definition: The degree to which the distribution is asymmetrical.
Skew
If deviations are below the median are they positive or negative?
Negative
How would you round the following decimal to the second decimal place?
0.9739
0.97
What scale is the most problematic?
Ordinal
What are the permissible statistics for interval scales?
Mean, Median, Mode (SD, Correlation, Regression, Analysis of Variance)
What (in SPSS) tells us if the data is bell-shaped? What range are they supposed to fall within?
Kurtosis; Between -1 & 1
How do we get rid of negative values in a deviation?
Square them!
How would you round the following decimal to the second decimal place?
0.9876
0.99
What is the definition of a ratio scale?
Numerical rankings that indicate differences in measure with a true zero.
What are the pros and cons for the "mean"?
Pros: Accounts for all values
Cons: Sensitive to extreme values
What four factors determine if data is normally distributed?
Bell-Shaped (Kurtosis)
Symmetrical (Skew)
Unimodal (Mode)
Centered on the Mean (Mean,Median,Mode)
What is standard deviation?
The average distance to the mean