A paired-difference experiment was conducted to compare two populations. The data are shown in the table. Use a sign test to determine whether the population distributions are different.
Pairs 
a. State the null and alternative hypotheses for the test.
b. Determine an appropriate rejection region with 
0.01.
c. Calculate the observed value of the test statistic.
d. Do the data present sufficient evidence to indicate that populations 1 and 2 are different?
Definitions:
Self-Actualization Needs
The highest level of Maslow's hierarchy of needs, representing the need for personal growth and realizing one's own potential.
Self-actualization
The achievement or satisfaction of one's abilities and possibilities, viewed as a motivation or necessity inherent in all people.
Self-fulfilled
The accomplishment of something that one has desired or predicted for oneself, often without external help.
Creative Extent
The degree to which something demonstrates originality, imagination, or innovation in its design, approach, or execution.
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