Which Best Illustrates the Distinction Between Statistical Significance and Practical

question 54

Multiple Choice

Which best illustrates the distinction between statistical significance and practical importance?

• A)"In 2016,240 out of 400 statistics students at Oxnard Technical College sold their textbooks at the end of the semester,compared with 220 out of 330 students in 2015,a significant decrease."
• B)"Our new manufacturing technique has increased the life of the 80 GB USB AsimoDrive external hard disk significantly,from 240,000 hours to 250,000 hours."
• C)"In 50,000 births,the new vaccine reduced the incidence of infant mortality in Morrovia significantly from 14.2 deaths per 1,000 births to 10.3 deaths per 1,000 births."
• D)"The new Sky Penetrator IV business jet's cruising range has increased significantly from 3,975 miles to 4,000 miles."

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Definitions:

Environmental Isolation

The separation of population groups by physical barriers or distances, leading to genetic divergence and potentially speciation.

Biological Isolation

The separation of populations of the same species or different species that prevents genetic exchange, often leading to speciation.

Temporal Isolation

A mechanism that prevents species from mating because they breed at different times, contributing to reproductive isolation and speciation.

Overlap

The extent to which two or more things cover part of the same area, share common elements, or occur at the same time.