A Research Assistant Takes a Survey of Local High School

question 1

Multiple Choice

A research assistant takes a survey of local high school students who participate in after-school sports about whether they have suffered a concussion in the last 90 days. This is an example of which method of controlling extraneous variables?

• A) Random assignment
• B) Bias selection
• C) Random sampling
• D) Manipulation control

---

Definitions:

Custom Layouts

Tailored designs and arrangements of graphical elements or data presentation structures in applications or documents, according to the user's preferences or needs.

Rehearse Timings

A feature in presentation software that allows users to practice the timing of their slides' transitions and animations.

Slide Timings

The pre-set durations allocated to each slide in a presentation, controlling how long a slide is displayed before transitioning to the next.

Slide Master View

A feature in presentation software that allows for the editing and customization of the layout and design of all the slides in a presentation.