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Hi again! :-) :-)
I've got into this "Significance Tests" section where we talk about Ho and Ha.
According to the definition of Ha, it is the claim or theory we find evidence for. Ho is a claim or theory we find evidence against.
Then in E 341- (b), the question says "You want to find out if the claim that the national unemployment rate is 4% is correct".
Then, the claim we're finding evidence for (which will become our Ha) is that the natl unemployment rate is 4%.
Based on this, shouldn't the Ha be p (not equal to ) 0.04??
I mean you told us that, in most of the cases, Ha is parameter > or < or (not equal to) value.
But it just confuses me haha
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almost always H0 is 'equal to', because that makes it easy to establish a dividing line.
but for the same H0, Ha can be 'not equal to', or 'greater/less than', so you need to read the question carefully for clues.
usually, when the question says something like: 'is believed to be lower', '~~ thinks this value underestimates the true value' .. then it is greater/less than. otherwise, if there is no opinion, it's not equal to.
It takes practice ;)
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Have a nice day!
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you too!
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