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A Teacher Figures That Final Grades in the Chemistry Department 25%;B,25%;C,40%;25 \% ; B , 25 \% ; C , 40 \% ;

Question 15

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A teacher figures that final grades in the chemistry department are distributed as: A, 25%;B,25%;C,40%;25 \% ; B , 25 \% ; C , 40 \% ; D, 5%;5 \% ; F, 5%5 \% . At the end of a randomly selected semester, the following number of grades were recorded. Determine if the grade distribution for the department is different than expected. Use α=0.01\alpha = 0.01 .
 Grade  A  B  C  D  F  Number 423660814\begin{array}{l|ccccc}\text { Grade } & \text { A } & \text { B } & \text { C } & \text { D } & \text { F } \\\hline \text { Number } & 42 & 36 & 60 & 8 & 14\end{array}

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