NARRBEGIN: Test Scores
Test Scores
the Scores on a Calculus

Essay

NARRBEGIN: Test scores
Test scores
The scores on a calculus test for a random sample of 40 students are as follows:
$$\begin{array} { l l l l l l l l l l } 63 & 74 & 42 & 65 & 51 & 54 & 36 & 56 & 68 & 57 \\62 & 64 & 76 & 67 & 79 & 61 & 81 & 77 & 59 & 38 \\84 & 68 & 71 & 94 & 71 & 86 & 69 & 75 & 91 & 55 \\48 & 82 & 83 & 54 & 79 & 62 & 68 & 58 & 41 & 47\end{array}$$ NARREND
-Forty truck buyers were asked to indicate the car dealer they believed offered the best overall service. The four choices were A, B, C, and D as shown below:
$\begin{array} { l } A&C&C&C&D&C&B&A&C&D&A&B&C\\A&B&C&B&A&C&B&B&C&B&B&A&C\\\text { A } & \text { C } & \text { C } & \text { A } & \text { D } & \text { B } & \text { B } & \text { C } & \text { C } & \text { A } & \text { C } & \text { D }&B\\A&D&C&D&A&B&B&C&D&A&B&D&A\\\end{array}$
Construct a table showing the frequencies and relative frequencies for this data set. What proportion of car buyers rated dealer D as the best?