QUESTION

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a. $\mathrm{H}_{\mathrm{O}}=47 ; \mathrm{H}_{\mathrm{a}}=47$ b. $\mathrm{H}_{\mathrm{O}}=47 ; \mathrm{H}_{\mathrm{a}}<47$ c. $\mathrm{H}_{\mathrm{O}}=47 ; \mathrm{H}_{\mathrm{a}}>47$ d. $\mathrm{H}_{\mathrm{O}}=47 ; \mathrm{H}_{\mathrm{a}} \neq 47$ a. $\mathrm{H}_{\mathrm{O}}=21.3 ; \mathrm{H}_{\mathrm{a}}=21.3$ b. $\mathrm{H}_{\mathrm{O}}=21.3 ; \mathrm{H}_{\mathrm{a}}>21.3$ c. $\mathrm{H}_{\mathrm{O}}=21.3 ; \mathrm{H}_{\mathrm{a}}<21.3$ d. $\mathrm{H}_{\mathrm{O}}=21.3 ; \mathrm{H}_{\mathrm{a}} \neq 21.3$ 9) What is the critical value for a left-tailed test with $\mathrm{a}=0.05$ and $\mathrm{n} \geq 30$. a. $\mathrm{Z}_{\mathrm{O}}=-2.33$ b. $\mathrm{Z}_{0}=-1.645$ c. $Z_{O}=-1.96$ d. $\mathrm{Z}_{\mathrm{O}}=2.58$ 10) When do you use a t-value instead of a $z$-value? a. When $n<30$ or standard deviation is known b. When $n \geq 30$ or standard deviation is known c. When $\mathrm{n}<30$ or standard deviation is unknown d. When $n \geq 30$ or standard deviation is unknown

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