Nsg 522- Epidemiology/biostats Study Guide Graded A+

Normality of the distribution {Ans: *assessed using a test of normality -shapiro wilk test -kolmogorov-smimov}Comparing groups: nominal variabels {Ans: *Contingency table analysis (cross tabulations) -fishers exact test for 2 independent, dichotomous variables -chi square test for 2 independent, nominal variables}What statistics should be reported? {Ans: *The decision of which measures of central location and spread are reported is determined by the normality of the distribution and the presence or absence of outliers. *If the data follow a normal distribution and there are no outliers, then the mean, SD, and epidemiological range are reported *If the data is not normally distributed OR if there are outliers (even 1) the median, IQR, and epidemiological range should be reported.}Sampling Methods {Ans: *process researchers use to select subjects from the population being studied *never assume that a random sampling method was used}Estimation {Ans: *process of determining likely values for unknown population parameters *a point estimate for a population parameter is the best single number estimate of that parameter (precise) *a confidence interval is a range of values for the estimated population parameter with a level of confidence attached (ex: 95% confidence that the true population parameter is located with