1what type of graph is most usefyl for illustrating the difference in survival rates for two or more groups?
- scatterplot
- histogram
- Kaplan Meir curve
- correlation matrix
2When the outcome is dichotomous and it occurs in more than 10% of the sample, which statistic is a more accurate estimate?
- pearson product - moment correlation
- linear regression
- odds ratio
- risk ratio
3Which value is most often used to represent the unique variance contributed by a variable or set of variables in linear regression?
4In a risk ratio, if a predictor variable contributes nothing to determing the outcome, what will the RR equal?
5Multicollinearity means that
- many of the predictor variables are inter-correlated
- many correlations are being performed
- there are multiple predictors included in the regression equation
- a survival curve is created as part of the results
6Which of the following is an example of a negative correlation
- fewer hours of sleep is related to a lower grade on a test
- the correlation between sleep and range of motion is R = 0.0
- fewer hours of sleep relates to more errors on a test
- more hours of sleep relates to a higher grade on a test
7Which of the following statistics is an effect size?
8Which statistic would you use for examining the relationship between two continuous variables in a cross-sectional study
- Pearson product moment correlation
- linear regression
- odds ratio
- risk ratio
9which of the following indicates the strongest relationship
10Confidence intervals are used to explain the excepted population values regarding what type of relationship statistic?