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

question 198

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

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Definitions:

Required Rate

typically refers to the minimum expected rate of return on an investment, necessary for it to be considered a viable option.

Required Rate

The minimum anticipated return an investor expects to achieve on an investment.

Annual Cash Flows

The net amount of cash and cash equivalents being transferred into and out of a business over a year, reflecting its operational efficiency and financial health.

Crossover Point

The point at which two or more alternative investments achieve the same cumulative cash flow or rate of return.