A teacher is interested in whether there is an association between how alert her students are and whether or not they drink coffee. She asks each of her students to indicate if they drink coffee regularly, and she categorizes each student's alertness level as alert, somewhat alert, or not alert (3 levels) based on her observations over a week long period of time. After organizing the data, she plans to conduct a chi-square test. Given these observed frequencies, what is the calculated chi-square value?