State the null and alternate hypotheses. Will you use aleft-tailed, right-tailed

Question

State the null and alternate hypotheses. Will you use aleft-tailed, right-tailed, or two-tailed test? The State Fish and Game Division claims that 75% of the fishin Homestead Creek are Rainbow Trout. However, the local fishingclub caught (and released) 189 fish one weekend, and found that 125were Rainbow Trout. The other fish were Brook Trout, Brown Trout,and so on. Does this indicate that the percentage of Rainbow Troutin Homestead Creek is less than 75%? Use = 0.01 State the null and alternate hypotheses. Will you use aleft-tailed, right-tailed, or two-tailed test? The State Fish and Game Division claims that 75% of the fishin Homestead Creek are Rainbow Trout. However, the local fishingclub caught (and released) 189 fish one weekend, and found that 125were Rainbow Trout. The other fish were Brook Trout, Brown Trout,and so on. Does this indicate that the percentage of Rainbow Troutin Homestead Creek is less than 75%? Use = 0.01

Explanation / Answer

Given n=189, phat=125/189=0.66 =0.01, Z(0.01)=-2.326 (check normal table) Use left-tailed test The test hypothesis is Ho:p=0.75 Ha:p

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