Related questions with answers
A study of class attendance and grades among first-year students at a state university show that in general students who attended a higher percent of their classes earned higher grades. Class attendance explained 16% of the variation in grade index among the students. What is the numerical value of the correlation between percent of classes attended and grade index?
State the null and alternative hypotheses for each of the following potential research questions. In each situation, also indicate whether the hypothesis test will be one-sided or two-sided. Do female college students study more, on average, than male college students do? Compared to men who are not bald, are bald men more likely to have heart disease? Is there a correlation between height and head circumference?
What is a correlation? What kind of correlation would you expect between students' grades and class attendance?
Correlation represents the interconnection of two variables. In this case, correlation means that the value of one variable can be predicted with a certain probability on the basis of knowledge about the value of another variable.
If we take into account that with the increase in student attendance, their grades also increase, then we can say that these two variables are in direct correlation.