Doctors at a Technology Research Facility Randomly Assigned Equal Numbers $\mathrm { H } _ { 0 } : \mu _ { 1 } - \mu _ { 2 } = 0$

question 244

Multiple Choice

Doctors at a technology research facility randomly assigned equal numbers of people to use computer keyboards in two rooms. In one room a group of people typed a manuscript using standard keyboards, while in the other room people typed the same manuscript using ergonomic keyboards to see if those people could type more words per minute. After collecting data for several days the researchers tested the hypothesis $\mathrm { H } _ { 0 } : \mu _ { 1 } - \mu _ { 2 } = 0$ against the one-tail alternative and found $P = 0.22$ . Which is true?

• A) none of these
• B) The people using ergonomic keyboards type 22% more words per minute.
• C) There's a 22% chance that there's really no difference in typing speed.
• D) There's a 22% chance another experiment will give these same results.
• E) There's a 22% chance that people using ergonomic keyboards type more words per minute.

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Definitions:

Color Names

Labels given to specific wavelengths of visible light perceived by the eyes, aiding in their identification and classification.

Brightness

A subjective attribute of visual perception in which a source appears to emit or reflect a high level of light.

Saturation

In color theory, saturation denotes the intensity of color in an image or visual object; in marketing, it refers to the level of market penetration of a product, service, or message.

Trichromatic Theory

A theory of color vision that suggests our ability to perceive color is based on the response rates of three types of cones in the eye, each sensitive to different light wavelengths.