Question

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

Multiple Choice

• "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."

• "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."

• "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."

• "The new Sky Penetrator IV business jet’s cruising range has increased significantly from 3,975 miles to 4,000 miles."

Answer 1

solution::-

From the given data,we have to choose which illustrates the distinction between statistical significance and practical significance (practical importance).

Statistical Significance::-

It tells us that the relation between two ro more variables which are caused by something other than chance under an experimental set up.

It can be determined with the help of a sample and more controlled situations.

Practical Significance::-

It explains the existence of relationship between the variables under a real life.

It refers to the magnitude effect.

It does not explains the deals under any controlled set-up.

From the given data statement--"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".

OPTION---" C" is correct answer.

In the given option it explains the difference between statistical significance and practical significance .

from the given experimental study it is very clear from the statement that it also effects the other factors effecting the deaths of the babies .

This statement clearly explains the question regarding the effectiveness of the new vaccine from the infant mortality.