psyc314- Ch9pt2

psyc314- Ch9pt2 - Covariation Scattergram Givesyouasenseof...

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Bivariate Relationships Covariation Statistical Independence How to Describe Quantitative Results

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Scattergram Trend between two quantitative measures Gives you a sense of: Direction. Positive/direct or negative/inverse relationship Form. Linear or non-linear Precision. Strength of the relationship.
1 10 2 9 3 8 4 7 5 6 6 5 7 4 8 3 9 2 10 1 Perfect Correlation:

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Examine Scattergram and Correlation: Extraversion and BAS Form? Precision? Direction?
Purpose: T-tests, ANOVAs, Chi-square test: Do results from a sample hold for a population? Inferential Statistics

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“Test statistics” are calculated using a formula. The test statistic will be near zero if there is no correlation or no difference between groups. Larger than zero test statistics result from TRUE differences between the groups in the whole population, AND Chance selection of people in each group who differ more than everyone in the population. Females
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• Spring '07
• Renken
• Null hypothesis, Statistical hypothesis testing, Type I and type II errors, critical value, inferential tests

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psyc314- Ch9pt2 - Covariation Scattergram Givesyouasenseof...

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