Essay

State the mathematical formula used to conduct a one-sample tt-test and define each of the symbols represented in the equation.

Question: State the mathematical formula used to conduct a one-sample tt-test and define each of the symbols represented in the equation.

Sample answer: To conduct a one-sample tt-test, researchers compute the tt statistic using the formula: t=Mμ0SDNt = \frac{M - \mu_0}{\frac{SD}{\sqrt{N}}}. In this equation, tt represents the tt statistic, MM is the sample mean, μ0\mu_0 is the hypothetical population mean serving as the standard of comparison, SDSD is the standard deviation of the sample, and NN indicates the total sample size.

Key points:

  • State the exact formula t=Mμ0SDNt = \frac{M - \mu_0}{\frac{SD}{\sqrt{N}}}
  • Identify MM as the sample mean
  • Identify μ0\mu_0 as the hypothetical population mean
  • Identify SDSD as the sample standard deviation
  • Identify NN as the total sample size

Rubric: A complete response must state the equation t=Mμ0SDNt = \frac{M - \mu_0}{\frac{SD}{\sqrt{N}}} and correctly identify: 1) MM as the sample mean, 2) μ0\mu_0 as the hypothetical population mean or standard of comparison, 3) SDSD as the sample standard deviation, and 4) NN as the total sample size.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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