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Unformatted text preview: MBT should be 98.26 not 98.6.
Research Question: Is it true that the MBT is not 98.6
but 98.26? We use the question of interest to determine the two
competing hypotheses
The null hypothesis (H0 ) is generally that there is no
eﬀect or no diﬀerence
The alternative hypothesis (Ha ) is the claim for which we
seek evidence. VISUALIZING CONFIDENCE INTERVALS and HYPOTHE Checkpoint 2 and Checkpoint 3
Visualizing CONFIDENCE INTERVALS
Visualizing Hypothesis Testing Hypothesis Tests We conclude in favor of Ha if the sample supports Ha and
provides strong evidence against the null hypothesis.
We measure the strength of evidence a sample shows
against the null hypothesis with a p value VISUALIZING CONFIDENCE INTERVALS and HYPOTHE Checkpoint 2 and Checkpoint 3
Visualizing CONFIDENCE INTERVALS
Visualizing Hypothesis Testing pvalue The pvalue is the probability of obtaining a sample
statistic as extreme as (or more extreme than) the
observed sample statistic, when the null hypothesis is
true.
A small pvalue means that the observed sample results
would be unlikely to happen, when the null hypothesis is
true, just by random chance. VISUALIZING CONFIDENCE INTERVALS and HYPOTHE Checkpoint 2 and Checkpoint 3
Visualizing CONFIDENCE INTERVALS
Visualizing Hypothesis Testing pvalue The pvalue as a measure of strength of evidence
The smaller the pvalue, the stronger the evidence
against the null hypothesis
and in support of the alternative hypothesis. VISUALI...
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This note was uploaded on 03/12/2014 for the course STATS 10 taught by Professor Ioudina during the Spring '08 term at UCLA.
 Spring '08
 Ioudina

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