SOLUTION: The mean weight of the adult Australian animal Swamp Wallaby the previous year was 15.4kg with a standard deviation of 2.5kg. This year a sample of 35 Swamp Wallaby were randomly s
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Question 1183826: The mean weight of the adult Australian animal Swamp Wallaby the previous year was 15.4kg with a standard deviation of 2.5kg. This year a sample of 35 Swamp Wallaby were randomly selected and their given mean weight was 14.6kg. At 0.05 significant level can we state that the mean weight of Swamp Wallaby does not differ from the previous year? (Two - Tailed test) Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! Ho: mu1=mu2
Ha: mu1 NE mu2
alpha=0.05 p{reject Ho|Ho true}
test is a z
critical value is |z|> 1.96
z=(14.6-15.4)/2.5/sqrt(35)
=-0.8*sqrt*35)/2.5
=-1.89
fail to reject Ho and insufficient evidence to conclude there has been a change at the 5% level.
p-value=0.058
