A professor is interested in prospective students' preference for the class format of a college statistics course: online, in-person, or hybrid.  A sample of 90 prospective students are surveyed and asked to indicate which class format they would prefer.  The professor finds the following frequencies: 50 students prefer an online statistics course 18 students prefer an in-person statistics course 22 students prefer a hybrid statistics course Using this information, what is the obtained chi-square statistic for this test?  Calculate this value with the expectation that all groups will have an equal preference.  Enter your answer rounded to two decimal places (i.e., 10.01, not 10, not 10.1, not 10.001).

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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A professor is interested in prospective students' preference for the class format of a college statistics course: online, in-person, or hybrid.  A sample of 90 prospective students are surveyed and asked to indicate which class format they would prefer.  The professor finds the following frequencies:

50 students prefer an online statistics course

18 students prefer an in-person statistics course

22 students prefer a hybrid statistics course

Using this information, what is the obtained chi-square statistic for this test?  Calculate this value with the expectation that all groups will have an equal preference.  Enter your answer rounded to two decimal places (i.e., 10.01, not 10, not 10.1, not 10.001).

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