DESCRIPTIVE STATS, STATISTICAL TESTS

Descriptive statistics

Levels of Measurement

• NOMINAL - Putting data into categories.
• ORDINAL - Putting data into rank order.
• INTERVAL - Equal numbers that indicate a different when comparing things; no meaningful zero.
• RATIO - Has same characteristics as interval data, except that it has a meaningful zero.

Measures of Central Tendency

• MODE - Most common value.
• MEDIAN - Arrange results in ascending order to find the middle value (average).
• MEAN - All numbers are added together, then divided by the amount of numbers present.

Measures of Dispersion

• RANGE - Highest and lowest values are added together, then divided by 2.
• STANDARD DEVIATION - Spread of scores in relation to the mean score …