An English Instructor Gave a Final Exam and Found a Mean

question 45

Multiple Choice

An English instructor gave a final exam and found a mean score of 69 points and a standard deviation of 5.8 points.Assume that a Normal model can be applied.Draw and label the Normal model for the exam scores.Then find the interval for the central 68% of the scores.

• A) ; 57.4 to 80.6 points
• B) ; 63.2 to 74.8 points
• C) ; 63.2 to 74.8 points
• D) ; 57.4 to 69 points
• E) ; 69 to 80.6 points

---

Definitions:

Push-to-start

A system allowing a vehicle to be started by pressing a button while the key fob is inside the vehicle.

Thermo-electric Expansion Capsules

Devices that utilize the Peltier effect to convert temperature differences into electric voltage, thereby enabling thermal expansion for various applications.

Reversible DC Electric Motors

Special types of DC motors that can change the direction of their rotation due to the reversal of current flow, allowing both clockwise and counterclockwise operation.

Solenoids

Electromagnetic actuators that convert electrical energy into mechanical action, commonly used in valves and relays to control fluid or air movement.