Flashcards
Inferential statistics & Report writing
Cards in this deck (11)
- 1nominal data, ordinal data (2), interval data, ratio data- data are in separate categories (f)
- data ordered in ranks but interval same X
=> subjective, so unsafe - ranks used
- data on a linear scale &measured using units of equal intervals
- equal intervals and there is a true zero point as it usually measures physical quantities - 2Spearman's Rho (3)- Data is not nominal
- Correlation
- Looking at relationships between Vs - 3Chi-squared (3)- Predicts difference between variables or association between co-vs
- Independent group design
- Nominal - 4Mann-Whitney (3)- Not nominal
- Independent
- Predicts difference between Vs - 5Wilcoxon T (3)- matched pair
- Predicts difference between Vs
- not nominal - 6Sign T (3)- Predicts difference between Vs
- Nominal
- Data are related - 7significance level (def 2 + 3 cons where stringent level may be used)- how sure we are that diff or rel exists
- the probability of the results being down to chance is _% or less
- stringent used where there may be a human cost e.g. drug trials/ one-off studies (rep X)/ calculated value significantly diff from CV in the preferred direction - 8Type 1 errorRejecting null hypo that is true because significant level used was too lenient
- chance of making error increases as the value of significant level increases - 9Type 2 errorAccepting null hypo that is not true because significant level used was too stringent
- chance of making error increases as the value of significant level decreases - 10Parametric test (4)- Inferential stats that make certain ass about the parameters of the pop from which the sample is drawn
- T tests and Pearsons r
- More powerful and robust: can detect sig when others can't
- must be interval (actual scores), normal distrubution, homogeneity of var ( sim dispersion) - 11What are the 7 parts of a report?1. Abstract: summary. background
2. Introduction: theory and studies, why
3. Method: design, ppts, materials, procedure
4. Results: summary data, statistical tests
5. Discussion: explain findings in terms of hypo
& conclusions against the background & limitations & implications
6. References
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- Psy A2 (RM) Flashcards on Inferential statistics & Report writing, created by Field Jellyfish on 10/05/2016.
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- Field Jellyfish
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