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OpenStudy (anonymous):
TRUE OR FALSE PLEASE HELP In real-life empirical studies, a "z" test is used far more frequently that the "t" test because sigma (population standard deviation) is known prior to conducting most research, especially in the 21st century in the US and Europe
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OpenStudy (benlindquist):
true
OpenStudy (anonymous):
thanks
OpenStudy (benlindquist):
np
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