a researcher measures the time (in seconds) it takes a sample of five participants to complete a memory task. It took four of the participants 4, 5, 5, and 6 seconds. If m=6, then what must be the fifth time recorded?

10 seconds

Explanation:

m here means mean.

Mean or more accurately arithmetic mean, is calculated by adding all the terms and then dividing by the number of terms.

If there are 5 terms being 4, 5, 5, 6 and a fifth one which is x, and the mean is 6. The relevant expression is:

(4 + 5 + 5 + 6 + x) / 5 = 6

Solving it:

4 + 5 + 5 + 6 + x = 6 * 5

20 + x = 30

x = 30 - 20

x = 10 seconds

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objectivity: lack of bias, judgment, or prejudice

accuracy: free of mistakes, to be correct

authority: the ability to tell people what to do or believe in

content: to be satisfied  

it can be said that the author made the article to present objectivity, to provide accurate information, to be the authority in the subject that he or she writes, and to be satisfied of the information quality given out.