A Test of Spelling Ability Is Given to a Random $\alpha$

question 3

Multiple Choice

A test of spelling ability is given to a random sample of 10 students before and after they completed a spelling course.The mean score before the course was 119.60 and after the course the mean score was 130.80.The standard deviation of the difference was 16.061.What do you conclude at $\alpha$ = .01?

• A)No evidence of a difference
• B)Significant difference in the scores

---

Definitions:

Permanent-Magnet Wheel Speed Sensor

A sensor that uses a permanent magnet to detect wheel speed, often used in anti-lock braking systems.

Analog

Pertaining to or using signals or information represented by a continuously variable physical quantity such as spatial position or voltage.

Digital

Pertaining to technology that encodes data as discrete numerical values, often represented as ones and zeros, for processing, storage, and transmission.

Electrohydraulic Unit

In an ABS system, this unit usually contains electric motors, solenoids, and valves that control the flow of brake fluid to the wheel brakes based on input from the EBCM.