The 550 Students Answered an Additional Question with the Following

question 49

Multiple Choice

The 550 students answered an additional question with the following results based on their rating of their instructor:
$$\begin{array} { | c | c | c | } \hline & \text { Very or Somewhat Effective } & \text { Very or Somewhat Ineffective } \\\hline \text { Final Grade } & & \\\hline \text { A } & 190 & 85 \\\hline \text { B } & 75 & 120 \\\hline \text { C } & 20 & 17 \\\hline \text { D } & 9 & 18 \\\hline \text { F } & 1 & 15 \\\hline\end{array}$$
$\begin{array} { ll l } \text {Rate the overall quality of your course. } \\&\text { Excellent } & 154 \\&\text { Good } & 187 \\&\text { Fair } & 71 \\&\text { Poor } & 138\\ \text { How effective was your instructor?} \\&\text { Very effective } & 75 \\&\text { Somewhat effective } & 220 \\&\text { Somewhat ineffective } & 155 \\&\text { Very ineffective } & 100\\ \text {How easy was it to read and understand the textbook? } \\&\text { Very easy } & 21 \\&\text { Easy } & 83 \\&\text { Hard } & 361 \\&\text { Very hard } & 85\end{array}$

Use the above results to answer the following questions:
Compute a point estimate of the proportion of all college statistic students who:

-What proportion of the students who rated their instructor as very or somewhat effective received a B or better in the class?

• A)0.345
• B)0.254
• C)0.482
• D)0.898
• E)0.644

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Definitions:

Extension

Extension is a movement that increases the angle between two body parts, such as straightening a flexed knee.

Bending Forward

A physical movement where the upper body moves closer to the legs, often used in exercises or as a stretch.

Shrugging Shoulders

A movement involving elevation of the shoulders, often as a gesture of indifference or to activate specific muscles in the upper body.

Biaxial Joint

A type of synovial joint that allows movement around two axes, providing a greater range of motion, such as seen in the wrist or ankle.