Test Scores
the Scores on a Calculus Test for a Random

question 68

Essay

Test scores
The scores on a calculus test for a random sample of 40 students are as follows:
$$\begin{array} { l l l l l l l l l l } 63 & 74 & 42 & 65 & 51 & 54 & 36 & 56 & 68 & 57 \\62 & 64 & 76 & 67 & 79 & 61 & 81 & 77 & 59 & 38 \\84 & 68 & 71 & 94 & 71 & 86 & 69 & 75 & 91 & 55 \\48 & 82 & 83 & 54 & 79 & 62 & 68 & 58 & 41 & 47\end{array}$$
-Fifty two 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:
$\begin{array}{llllllllllll}\mathrm{A} & \mathrm{C} & \mathrm{C} & \mathrm{C} & \mathrm{D} & \mathrm{C} & \mathrm{B} & \mathrm{A} & \mathrm{C} & \mathrm{D} & \mathrm{A} & \mathrm{B} & \mathrm{C} \\\mathrm{D} & \mathrm{B} & \mathrm{C} & \mathrm{B} & \mathrm{A} & \mathrm{C} & \mathrm{B} & \mathrm{B} & \mathrm{C} & \mathrm{B} & \mathrm{B} & \mathrm{A}& \mathrm{C} \\\mathrm{A} & \mathrm{C} & \mathrm{C} & \mathrm{A} & \mathrm{D} & \mathrm{B} & \mathrm{B} & \mathrm{C} & \mathrm{C} & \mathrm{A} & \mathrm{C} & \mathrm{D}& \mathrm{B} \\\mathrm{A} & \mathrm{D} & \mathrm{C} & \mathrm{D} & \mathrm{A} & \mathrm{B} & \mathrm{B} & \mathrm{C} & \mathrm{D} & \mathrm{A} & \mathrm{B} & \mathrm{D}& \mathrm{A} \end{array}$ Construct a table showing the frequencies and relative frequencies for this data set.What proportion of car buyers rated dealer D as the best?

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Definitions:

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response, affecting mood and arousal.

Computer Voice Stress Analyzer

A device or software used to evaluate stress levels in a person's voice, often claimed to be useful in lie detection.

Polygraph

A device used to measure and record physiological indicators such as blood pressure, pulse, and skin conductivity while the subject is asked questions, purportedly to detect lies.

Lie Detection

The process of determining whether a person is telling the truth or lying, through various methods including physiological responses and behavioral analysis.