Lecture_3_Visualizing_Confidence_Intervals_and_Hypothesis_Testing

Mbt should be 9826 not 986 research question is it

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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 p-value The p-value 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 p-value 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 p-value The p-value as a measure of strength of evidence The smaller the p-value, 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.

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