A Biology Professor Claims That, on the Average, 15% of Her

Multiple Choice

A biology professor claims that, on the average, 15% of her students get a grade of A, 30% get a B, 30% get a C, 10% get a D, and 15% get an F. The grades of a random sample of 105 students were Recorded. The following table presents the results.

$\begin{array} { c | l l l l l } \text { Grade } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Observed } & 17 & 39 & 26 & 5 & 18\end{array}$

Test the hypothesis that the grades follow the distribution claimed by the professor. Use the $\alpha = 0.01$ level of Significance.

A) Reject $H _ { 0 }$
B) Do not reject $H _ { 0 }$