A Biology Professor Claims That, on the Average, 10% of Her

Multiple Choice

A biology professor claims that, on the average, 10% of her students get a grade of A, 30% get a B, 35% get a C, 10% get a D, and 15% get an F. The grades of a random sample of 113 students were Recorded. The following table presents the results.

$\begin{array} { c | l l l l l } \text { Grade } & 1 & 2 & 3 & 4 & 5 \\\hline \text { Observed } & 3 & 34 & 38 & 12 & 26\end{array}$

Compute the expected frequencies.

A) 3,34,38,12,26
B) 0.027,0.301,0.336,0.106,0.23
C) 11.3,33.9,39.55,11.3,16.95
D) 22.6,22.6,22.6,22.6,22.6