The population mean for the Elementary Tenacity Test ETT) is 150 with $\sigma_{x}=25$ A recent study of elementary school children participating in a school lunch program obtained the following ETT scores.Use a two-tailed z-test and $\alpha=0.05$

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The Answer of The population mean for the Elementary Tenacity Test ETT) is 150 with $\sigma_{x}=25$ A recent study of elementary school children participating in a school lunch program obtained the following ETT scores.Use a two-tailed z-test and $\alpha=0.05$

The Population Mean for the Elementary Tenacity Test ETT) Is σx=25\sigma_{x}=25σx​=25

The Population Mean for the Elementary Tenacity Test ETT) Is $\sigma_{x}=25$