Which test would be used to determine if the observed counts are the "same" as the expected counts?
Chi Squared Test for Goodness of Fit
100
For a chi-squared goodness of fit test, how do you determine the degrees of freedom?
(The number of categories) - 1
100
What must the value of expected counts be to satisfy the expected number condition?
greater than 5
100
What is the distribution of chi-squared? (be specific)
Skewed right
100
What is the name of Mr. Guy's daughter
Sarah
200
Which test would be used to determine if the distributions are the same for various groups?
Chi Squared Test for Homogeneity
200
For a chi-squared test of homogeneity, how do you determine the degrees of freedom?
(# of rows - 1) x (# of columns - 1)
200
How do you prove the expected counts condition for a chi-squared test for homogeneity or independence?
Enter the data into a matrix and run the chi-squared test. Look at the values computed into the new matrix.
200
What is the formula of chi-squared?
chi-squared= ∑(observed - expected)^2/√expected
200
What school does Mr. Guy's eldest son attend?
University of Chicago
300
Which test is used to determine if there is a relationship between two variables?
Chi Squared Test for Independence
300
For a chi-squared test for independence, how do you determine the degrees of freedom?
(# rows - 1) x (# columns - 1)
300
What conditions does a random sample of 1000 skittles satisfy?
Independent, random, and 10% condition.
300
What is the p-value of the chi-squared value 3.456 with 5 degrees of freedom?
And the answer is...
300
What university did Mr. Guy attend for his undergraduate studies?
St. Norbert's College
400
What is an observed count?
Observed counts are the actual values found from the sample(s).
400
What is the degrees of freedom when there are 3 columns and 7 rows.
(C-1)*(R-1)=DF
(3-1)*(7-1)=18
400
What are the hypotheses for a chi-squared test for homogeneity?
Null hypothesis: The distribution of ___ is the same.
Alternate hypothesis: The distribution of _____ is not the same.
400
How do you tell where the distribution is different?
The standardized residuals.
c=(observed - expected)/√expected
400
What is the university where Mr. Guy obtained his Master's degree?
UW Madison
500
What does the p-value represent.
The probability of observing your data (or something more extreme) if the null hypothesis is true.
500
What are the degrees of freedom for this table:
Small Big Total
Red 30 40 70
Blue 20 25 45
Yellow 50 30 80
Green 25 25 50
Total 125 120 245
(2-1)*(4-1)=3
The total column and row are not included.
500
What are the hypotheses for a chi-squared test for homogeneity?
Null hypothesis: The distribution of _____ is the same/they are dependent.
Alternate hypothesis: The distribution of _____ is not the same/they are independent.
500
Calculate the chi-squared value for an observed value of 5 and the expected value 4.36