An Internet Company Offers an On-Line Proficiency Course in Basic $$\begin{array} { c c } \text { Region } & \text { Enrolment } \\1 & 45 \\2 & 60 \\3 & 30 \\4 & 40 \\5 & 50 \\6 & 55 \\7 & 35\end{array}$$

An internet company offers an on-line proficiency course in basic accounting.Completion of this online course satisfies the "Fundamentals of Accounting" course requirement in many MBA programs.In the first semester,315 students have enrolled in the course.The marketing research manager divided the country into seven regions of approximately equal populations.The course enrolment values in each of the seven regions are given below.The management wants to know if there is equal interest in the course across all regions. $$\begin{array} { c c } \text { Region } & \text { Enrolment } \\1 & 45 \\2 & 60 \\3 & 30 \\4 & 40 \\5 & 50 \\6 & 55 \\7 & 35\end{array}$$
-Calculate the value of the chi-square statistic.