A population mean is 45. A one-sample t test is conducted with n = 9 subjects and results in a sample mean of 48 with a s = 5. What is t_obt? A) +1.80 B) -1.80 C) +5.36 D) -5.36

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Quizplus · Accepted Answer

The t-score is calculated using the formula $t = \frac{\bar{x} - \mu}{(s/\sqrt{n})}$, where $\bar{x}$ is the sample mean, $\mu$ is the population mean, $s$ is the sample standard deviation, and $n$ is the sample size. Plugging in the given values: $t = \frac{48 - 45}{(5/\sqrt{9})} = \frac{3}{(5/3)} = \frac{3}{1.6667} = 1.80$.

A Population Mean Is 45