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The Table Shows Crashworthiness Ratings for Several Categories of Motor

question 115

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The table shows crashworthiness ratings for several categories of motor vehicles. Take X as the crash-test rating of a small car, Y as the crash-test rating for a small SUV, and so on, as shown in the table. $\begin{array}{|l|l|l|l|l|l|}\hline&&\text { Overall Frontal Crash Test Rating }\\\hline & \text { Number Tested } & \begin{array}{l}\mathbf{3} \\\text { (Good) }\end{array} & \begin{array}{l}\mathbf{2} \\\text { (Acceptable) }\end{array} & \begin{array}{l}\mathbf{1} \\\text { (Marginal) }\end{array} & \begin{array}{l}\mathbf{0} \\\text { (Poor) }\end{array} \\\hline \text { Small Cars } X & 20 & 1 & 13 & 3 & 3 \\\hline \text { Small SUVs } Y & 10 & 1 & 4 & 4 & 1 \\\hline \text { Medium SUVs } Z & 15 & 3 & 5 & 3 & 4 \\\hline \text { Passenger Vans } U & 13 & 3 & 0 & 3 & 7 \\\hline \text { Midsize Cars } V & 15 & 3 & 5 & 0 & 7 \\\hline \text { Large Cars } W & 19 & 9 & 5 & 3 & 2 \\\hline\end{array}$ Compute $P ( Y \leq 1 )$ .

$The table shows crashworthiness ratings for several categories of motor vehicles. Take X as the crash-test rating of a small car, Y as the crash-test rating for a small SUV, and so on, as shown in the table. \begin{array}{|l|l|l|l|l|l|}\hline&&\text { Overall Frontal Crash Test Rating }\\ \hline & \text { Number Tested } & \begin{array}{l} \mathbf{3} \\ \text { (Good) } \end{array} & \begin{array}{l} \mathbf{2} \\ \text { (Acceptable) } \end{array} & \begin{array}{l} \mathbf{1} \\ \text { (Marginal) } \end{array} & \begin{array}{l} \mathbf{0} \\ \text { (Poor) } \end{array} \\ \hline \text { Small Cars } X & 20 & 1 & 13 & 3 & 3 \\ \hline \text { Small SUVs } Y & 10 & 1 & 4 & 4 & 1 \\ \hline \text { Medium SUVs } Z & 15 & 3 & 5 & 3 & 4 \\ \hline \text { Passenger Vans } U & 13 & 3 & 0 & 3 & 7 \\ \hline \text { Midsize Cars } V & 15 & 3 & 5 & 0 & 7 \\ \hline \text { Large Cars } W & 19 & 9 & 5 & 3 & 2 \\ \hline \end{array} Compute P ( Y \leq 1 ) . A) P ( Y \leq 1 ) = 0.3 B) P ( Y \leq 1 ) = 0.2 C) P ( Y \leq 1 ) = 0.1 D) P ( Y \leq 1 ) = 0.5 E) P ( Y \leq 1 ) = 1$

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