Vocabulary
Formulas
Random
Applications
Equations
100
Predicts scores that are outside the range of the collected data
What is extrapolation.
100
What is the formula for chi-square?
sum of (O-E)^2 / E
100
What is the difference between experimental and correlation design?
Experimental is at least 1 independent variable, 1 dependent variable and implies causation. Correlation design is no independent variable, 2 or more dependent variables, and there is a relationship between the two variables.
100
When would you use an experimental design?
In a controlled setting where you can manipulate an independent variable.
100
Which degrees of freedom would you use when doing a chi-square test? A) the number of categories - 1 B) N-k C) n1 + n2 - 2
A) The number of categories - 1
200
When the effect of an independent variable depends on the level of a second independent variable.
What is an interaction
200
What is the formula for sums of squares between (SSb)?
What is sum of (Mg-MG)^2 * n
200
Also known as the "goodness of fit" test, this test does not use population parameters.
What is the chi-square.
200
When would you use a correlational design?
When you cannot manipulate anything and when you are observing if there is a relationship.
200
See diagram for this one!
There is an interaction.
300
A measurement of how expectations compare to results
What is chi-square statistic
300
What is the formula for the degrees of freedom within?
What is N-k
300
What does ANOVA stand for?
What is Analysis of Variance .
300
When would you use an ANOVA test?
When there are more than 2 groups that are being compared.
300
We need to find out if there is gender equality in the workplace. There are 13 men and 7 women. There is a critical chi-square of 3.841. Solve.
What is 1.8, therefore, accept the null.
400
What is the difference between a Tukey's test and a Scheffe's follow up test?
What is the Scheffe test is more conservative so you are less likely to detect difference in your data.
400
What is the order of the equations used to predict someone's SAT score given their GPA? There are 3 equations.
What is calculate slope (b), calculate y-intercept (a), and then solve for x.
400
What are the advantages of a correlation design?
It is more practical and ethical in some cases. More external validity. Allows us to predict 1 variable from another.
400
Conceptually speaking, what is being compared in an F-test?
To determine the size of the between group differences relative to the individual differences.
400
Find Pearson's r for SAT scores of 1050, 1200, 1400, and 1100. GPA scores of 3, 3.9, 3.9, and 3.
What is .84
500
What is the purpose of Tukey test?
It identifies the critical mean difference required for any two groups to be different. Designed to permit multiple comparisons and still maintain false alarm rate of .05.
500
What is the formula for Pearson's r?
r= the sum of ZxZy / n-1
500
Why is the study of statistics so important for scientific disciplines?
Creating a hypothesis is part of the scientific method. When testing an hypothesis, you need to decide if your data is significant or due to chance alone. Statistics helps in decision making because it tests statistical significance.
500
When would you use a 2-Way ANOVA?
When you are looking for 2 main effects and 1 interaction.
500
Predict the SAT score of a student with a GPA of 2.5 using the data from the previous question? SAT 1050, 1200, 1400, 1100. GPA 3, 3.9, 3.9, 3.
What is 949.975
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