I. What scale of measurement is expected grade? a.) nominal b.) ordinal c.) interval d.) ratio II. What scale of measurement is overall quality? a.) nominal b.) ordinal c.) interval d.) ratio III. What type of statistic should be performed? a.) dependent t-test b.) chi square test of independence c.) correlation d.) linear regression
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
I. What scale of measurement is expected grade?
a.) nominal
b.) ordinal
c.) interval
d.) ratio
II. What scale of measurement is overall quality?
a.) nominal
b.) ordinal
c.) interval
d.) ratio
III. What type of statistic should be performed?
a.) dependent t-test
b.) chi square test of independence
c.)
d.) linear regression
IV. What is the value of the statistic you performed (2 decimal pts)?
V. What the result significant at an alpha of .05?
a.) no
b.) yes
VI. What is the coefficient of determination (2 decimal pts)?
VII. The student's expected grade could be used to predict the overall teacher quality?
a.) True
b.) False
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