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Cards In This Set
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Hypothesis
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Statement about a population parameter subject
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Data are used to check the ___ of a statement
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Reasonableness
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Hypothesis testing
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Procedure based on sample evidence and prob theory to determine whether the hypthesis is a reasonable statement
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List five steps in hypothesis testing procedure
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State null and alternate hyp
select a level of sig ndentify the test stat formulate a decision rule take a sample and arrive at a decision |
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Does a hypothesis prove a statement?
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No it gives a proof beyond a meassureable doubt
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Null hypothesis
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A statement about the value of a population parameter developed for the pupose of testing numerical evidence
current reported condition. ALWAYS has the equal sign. this is the statement being tested |
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Alternate hypothesis
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Statement that is accepted if the sample data provide sufficient evidence that the null hypothsis is false
null is not true. |
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Level of significance
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The probabitlity of rejecting the null hypothesis when it is true.
called alpha |
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Type I error
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Rejecting null hypothesis when it is true
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Type II error
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Accepting the null hypothesis when it is false
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Test statistic
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A value determined from sample information used to determine whether to reject the null hypothesis
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What formula is used when pop stand dev is known?
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Z score
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Decision rule is
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A statement of the specific sonditions under which the null hypothesis is rejected and the conditions under which it is not rejected
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The region of rejection defines the location of all those values that are so ___ or so __ that the prob of thier occurance under trye null hyp is rather remote
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Large, small
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Critical value
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The dividing point between the region where the null hyp is rejected and the region where it is not rejected
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