LESSON 5 DESCRIPTIVE STATISTICS Flashcards
IMPORTANT TERMS
Plotting Values of observation
Frequency distribution
IMPORTANT TERMS
Normal Distribution
Characterized by bell-curved shaped
TYPES OF DISTRIBUTION
Left side is mirror imgae of right side
Symmetric
TYPES OF DISTRIBUTION
Right tail is longer than the left
Positively skewed/Floor Effect
TYPES OF DISTRIBUTION
Left tail is longer than the right
Negatively Skewed/Ceiling Effect
TYPES OF DISTRIBUTION
One highest Point
Unimodal
TYPES OF DISTRIBUTION
Two high points
Bimodal
TYPES OF DISTRIBUTION
Can be Unimodal, Symmetric, or Asymptotic
Normal
IMPORTANT TERMS
Describes the number of peaks a distribution has
Modality
IMPORTANT TERMS
How peaked the data in the distribution
Kurtosis
TYPES OF KURTOSIS
When the degree of peakedness is greater than 3
Leptokurtic
TYPES OF KURTOSIS
When the degree of peakedness is equal to 3
Mesokurtic
TYPES OF KURTOSIS
When the degree of peakedness is less than 3
Platykurtic
IMPORTANT TERMS
Center where the distribution lies
Central Tendencies
IMPORTANT TERMS
Occurs more frequently in the data set
Mode
IMPORTANT TERMS
Scores are ranked in order of magnitude
Median
IMPORTANT TERMS
The average scores
Mean
IMPORTANT TERMS
Dispersion of dataset relative to its mean
Standard Deviation
IMPORTANT TERMS
A measure of how representative a sample is likely to be of the population
Standard Error
IMPORTANT TERMS
As the population size increases >30, the data becomes normal
Central Limit Theorem
IMPORTANT TERMS
The accuracy of sample mean as an estimate of the mean in the Population, the ‘true value’ will fall
Confidence Interval
IMPORTANT TERMS
The presence or absence of an effect
Hypothesis
IMPORTANT TERMS
The strength of a statistical claim (magnitude)
Effect Size
