Correlation
What letter denotes a pearson's correlation?
r
What type of variable(s) are used for a chi-squared goodness of fit test?
1 categorical variable
Which types of variable(s) are used for this test?
2 categorical variables
What does the null hypothesis represent?
No effect/relationship
What does the correlation coefficient tell us?
Direction and magnitude of the relationship
What is the equation for degrees of freedom?
df = k-1
What is the equation for degrees of freedom?
df = (r-1)(c-1)
What is the purpose of performing hypothesis testing?
To determine if there is a statistically significant relationship.
Which type of variables are used in a correlation?
What is the purpose of performing a chi-squared goodness of fit test?
To understand if the observed and expected frequencies are similar or different from each other.
What is the purpose of performing this test?
To understand if 2 categorical variables are related.
A distribution has 4 categories. The observed chi-squared statistic is 3.4. The critical value at α = 0.05 and df = 3 is 3.41. What is the correct conclusion?
Reject H0
A r value of 0.4 is what type of correlation?
What is the null hypothesis?
The sample proportions fit the claimed population distribution.
What is the name for effect size for this test?
Cramer's v
What does the alpha value represent?
The probability of making a type 1 error.