Scale of Measurement
What scale is this: Phone Number
Nominal
What type of data can be measured in decimal places?
What measure of central tendency is our "favorite child"?
Mean
How many steps are in Hypothesis Tests with Z-score
4
4
What scale is this: Military Ranks
Ordinal
What type of data can only exist in whole numbers?
What measure of central tendency splits a distribution in half?
Median
What do we calculate only when we reject the Null?
Effect size (Cohens D)
What design do we use if the subjects are made of of entirely different people who are not related to each other?
Between-Subjects Design
What scale is this: a 1-5 scale
Interval
What type of data differs by amount (Hint: Numeric)
What measure of central tendency is follows the formula ∑X/N
Mean
What does it mean when we say P<.05?
There is a less than 5% chance of observing this result.
What type of T-test compares 2 sample means with a between subject design?
Independent sample T-test
What scale is this: Height
Ratio
What type of data differs by class? (Hint: Categorical)
What type of central tendency is the least informative?
Mode
What type of error occurs when we incorrectly reject the null hypothesis when it is actually true?
Type 1 Error (or alpha error)
What design uses the same participants in both conditions?
Repeated measures design
What questions can you ask yourself to find scale?
1. Is there an underlying order
2. Are the differences between each point the same?
3. Is there a true 0 point on the scale?
What type of chart is used for Discrete variables
What type of statistic is central tendancy?
Summary Statistic
What 5 peices of data do we need for a Hypothesis test with Z-Scores? (Hint: Step 0)
Population Mean (Mew)
Population Standard Deviation
Sample size (n)
Sample Mean (M)
Alpha Level
What design has different participants that come together?
Matched Pairs design