Review 4 Flashcards
What type of central tendency is:
The most precise measure of central tendency of ordinal level data or skewed interval or ratio levels
Median
This is an example of:
Number of scores + 1
Then divided by 2
2, 4, 6, 9,13 (Answer: 6)
Median
Term:
Score at the exact middle of all the scores
Median (MD)
This is an example of:
Raw scores: 8, 9, 9, 10, 11, 11
£x = sum of scores (58)
N= sample size (6)
58/6=9.667
Mean (x)
-average of all scores of a sample
Tendency Term:
Most accurate measure for normal distribution:
interval data, ratio level data
Mean (x)
What is:
Provides more user friendly data in ordinal data
Easier to interpret then raw numbers
Percentages
What type of Graph:
Uses vertical bars to display frequency
Horizontal (X-axis) continuous variable
Vertical (y-axis) frequency or percentage
Histogram
What type of graph:
Normal distribution or curve knows as a bell shape
Most scores pile near the middle
Frequently distribution
What type of skewness:
Tails off to the right
Positive skewness
What type of skewness:
-tail to the left
Negative skewness
Term:
Scores that lie far out from the rest of the data
Outliers
Kurtosis
(how peaked or flat a frequency)
What type:
Normal distribution
Mesokurtic
Kurtosis
(how peaked or flat a frequency)
What type:
Peaked distribution
Leptokurtic
Kurtosis
(how peaked or flat a frequency)
What type:
Plateaued distribution
Platukurtic
Term:
Number of clear distinguishable peaks/highpoints
Modality
Type of graph:
Created with joining points with a line
Polygon (Line graph)
Sampling methods:
Convenience sample
Snowball sampling
Quota sampling
Purposive sample
Judgmental sampling
Non probability (non-random)
Sampling method:
Simple random sample
Stratified random sample
Systematic random sample
Cluster sampling
Probability (true random)
