Similar to a Mechanical Mouse That Has a Ball on the Bottom

question 28

Multiple Choice

Similar to a mechanical mouse that has a ball on the bottom, a particular kind of stationary pointing device has a ball on its top or side. What kind of pointing device is this?

• A) trackball
• B) touchpad
• C) optical mouse
• D) stylus

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Definitions:

DfWG

Degree of Freedom Within Groups, which quantifies the variability of observations within individual groups in an ANOVA test.

One-way ANOVA

A statistical test utilized to compare the means of three or more independent groups to determine if there is a significant difference among them.

F-ratio

A statistic commonly used in ANOVA (Analysis of Variance) to compare the variances between groups to see if there is a significant difference between them.

Critical Value

A point on the scale of the test statistic beyond which the null hypothesis is rejected; it depends on the chosen significance level.