A group of students were tested using a new software program.The researchers observed a sample mean of with a sample size of N = 20.They know the population mean is $\begin{array}{l}
\bar{X}=42 \
\alpha=.05
\end{array}$ $\mu=38$ and $\sigma=10$ , so they use and a one-tailed test to determine if their sample is greater than the known population mean.

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The Answer of A group of students were tested using a new software program.The researchers observed a sample mean of with a sample size of N = 20.They know the population mean is $\begin{array}{l}
\bar{X}=42 \
\alpha=.05
\end{array}$ $\mu=38$ and $\sigma=10$ , so they use and a one-tailed test to determine if their sample is greater than the known population mean.

A Group of Students Were Tested Using a New Software Xˉ=42α=.05\begin{array}{l}\bar{X}=42 \\\alpha=.05\end{array}Xˉ=42α=.05​

A Group of Students Were Tested Using a New Software $\begin{array}{l}\bar{X}=42 \\\alpha=.05\end{array}$