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The following is a set of hypotheses, some information from one or more samples, and a standard error from a randomization distribution.$\newline$Test $H_{0}: \mu=9$ vs $H_{a}: \mu \neq 9$ when the sample has $n=80, \bar{x}=11.2$, and $s=0.88$ with $S E=0.10$.$\newline$Find the value of the standardized $z$-test statistic$\newline$Round your answer to two decimal places.$\newline$$$z=$$