A Teacher Figures That Final Grades in the Statistics Department $$\chi _ { 0 } ^ { 2 }$$

question 89

Multiple Choice

A teacher figures that final grades in the statistics department are distributed as: A, 25%; B, 25%; C, 40%; D, 5%; F, 5%. At the end of a randomly selected semester, the following number of grades were recorded. Find the
Critical value χ $$\chi _ { 0 } ^ { 2 }$$ to determine if the grade distribution for the department is different than expected. Use $$\alpha =$$ .01. $$\begin{array} { l | l l l l l } \text { Grade } & \text { A } & \text { B } & \text { C } & \text { D } & \text { F } \\\hline \text { Number } & 42 & 36 & 60 & 8 & 14\end{array}$$

• A)13.277
• B)11.143
• C)9.488
• D)7.779

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