Which is relatively better: a score of 87 on a psychology test or a score of 52 on an economics test? scores on the psychology test have a mean of 92 and a standard deviation of 5. scores on the economics test have a mean of 62 and a standard deviation of 6.

Psychology test score is relatively better than economics test score.

Step-by-step explanation:

For this question, we are using Z-score to compare the psychology test score and economics test score.

Z-scores are an approach to compare results from a test with a "normal" population.

Z =

where,

X - Test score

u - Mean

S.D - Standard deviation

Psychology Test:

Z =

=

= -1

Economics Test:

Z =

=

= -1.6

Hence, above calculation shows that z- score for pshychology test is greater than the z- score for economics test. so, psychology test score is better than economics test score.

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

step-by-step explanation: