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Sagot :
Answer:
The distinction between statistical significance and practical importance is best illustrated by:
C. In 50,000 births, the new vaccine reduced the incidence of infant mortality in Morrovia significantly from 14.2 deaths per 1000 births to 10.3 deaths per 1000 births.
Step-by-step explanation:
Current state Previous state Change
A. Textbooks sold 240/400 (0.6) 220/330 (0.67) 0.07
B. Life of hard disk 250,000 hrs 240,000 hrs 0.04
C. Infant mortality 10.3 per 1000 14.2 per 1000 0.27
D. Cruising range 4,000 miles 3,975 miles 0.006
Statistical significance, which depends on the p-value established before the test, relates to whether an effect exists, while practical significance determines the magnitude or size of the effect. A statistical test cannot tell whether the magnitude is large enough to be important. Mathematically, the change can be determined, which establishes the practical significance or importance of the change.
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