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Flashcards do conjunto (15)
- 1What statistical model do we use to fit our data?Based on research question
- 2What 4 broad questions are there?1- Difference between 2 or more means 2- Relationship 3. Prediction of group membership 4- Determining group structure
- 3Stat model for differences between means?t-test (2 means), anova (3+ means), manova (Multiple Dvs)
- 4Relationship Stat modelCorrelation and regression
- 5Stat model for group membershipDFA Discriminant Function Analysis
- 6Group structure stat modelPCA principal component analysis, Factor analysis
- 7What are Inferential StatisticsDraw inferences about the population from information available from samples.
- 8One sample research design z scores are used for?Determining where a particular score falls in a set of data, Standard error of means, probability value of that sample representing pop sample, low p value means its from a different pop
- 9What is null hypothesis ?There is no differnece between sample mean and population mean. If the z score is low, p value high we retain null. If z score is high and p value low its significant and we reject the null
- 10What type of tail does an alternative hypothesis usually haveNon directional 2 tailed
- 11What is critical z value for two tailed and one tailed?In one tail the critical z score is 1.65 (0.5 in tail) in two tailed z= 1.96 (0.025 in each tail) if z is bigger then we reject the null is z is smaller we retain null
- 12What is the degree of freedomNumber of pieces of information needed to determine a statistic. When we use sample mean no more than n-1 df
- 13Explain T TestWe use t test when we dont have sd. When large sample (30+) the ditrubution will be mush the same as that of a normal distrubution. However when sample is small (less than 30) the distribution is fatter and more area under tails. This is because the sample sd is used and not the pop sd. Created uncertainty
- 14what is critical t value2.15
- 15When do we use t valuewhen we have data from a ingle sample and want to determine if mean of population that sample comes from is the same as the hypothesis mean
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- Bachelor of Psychology Evidence Based Approach FlashCards sobre Sem título, criado por megandee em 03-05-2014.
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- megandee
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