CHDA Domain 3 (Data Analysis) Exam Review |100% Correct|

CHDA Domain 3 (Data Analysis) Exam Review |100% Correct| Among the software programs listed below, the one best suited to detailed statistical analysis of data is which of the following? SPSS 3 multiple choice options Non-parametric tests such as a Kruskal-Wallis are advantageous compared to their parametric counterparts for which of the following reasons? They require few assumptions 3 multiple choice options Which of the following is an expression of the extent of a linear relationship between two variables? Correlation 3 multiple choice options Your CMO has requested that you track patient satisfaction over time and in a way that attempts to separate routine variation from true underlying changes over time. The est tool to select from the options below is a ____. Statistical process control chart 3 multiple choice options When a data analyst develops a sample selection involving the choice of every fourth patient from each clinic schedule for each physician during the course of a three month period, this sampling technique being used by the analyst is called which of the following? Systematic random sampling 3 multiple choice options How do you calculate range? Max - Min The type of statistical techniques used to make conclusions based on a sample are ____. Inferential 3 multiple choice options The mean is an appropriate statistic to use to measure which type of data? Ratio (quantitative data where there is an absolute 0, there can be no negative numerical value in ratio data (example is weight)) 3 multiple choice options In a chi-squared test of independence, the test statistic is 7.23 and the alpha is .01 (critical value 6.635). What is the conclusion? Reject the null hypothesis (when the test statistic is greater than your critical value) 3 multiple choice options If a health plan analyst wanted to determine if the readmissions rates for two hospitals were statistically different, what hypothesis test should be used? Two-sample z-test for proportions 3 multiple choice options A researcher would like to test the null hypothesis that the LOS at two hospitals are equal. What statistical test should the researcher use in this situation? t-test for means 3 multiple choice options We want to compare the average weight of patients before and after a specialty diet is administered. We expect the weight to decrease after administration of the diet. Which of the following tests should be conducted to determine if the average weight for each patient is less at the conclusion of the diet? Paired t-test 3 multiple choice options The variable that may cause the change in a second variable is called the ____. Independent variable (the variable that is used to predict is called the independent, the outcome variable is the dependent) 3 multiple choice options If the correlation between years of experience and salary is positive, what can you conclude about the slope of a regression line that might be fit to describe the relationship? The slope will be positive 3 multiple choice options What are the assumptions made regarding the residuals in least squares regression? The mean is zero, they are all independent, they are approximately normally distributed A sampling technique that divides the population into subsets and then selects a random sample within each subset is called ____. Stratified random sampling (groups are called strata's and they are based on criteria) 3 multiple choice options In order to increase the precision of a confidence interval and leave the confidence level the same, the sample size must be ____. Larger 3 multiple choice options If an analyst is studying the wait times at a clinic and the only list of patients available is hard copu, which sampling technique is the easiest to use? Systematic sampling 3 multiple choice options What is the biggest problem with using mean LOS as a facility statistic? It is influenced by outlier values 3 multiple choice options ALOS is an example of a ___. Descriptive statistic 3 multiple choice options How do you calculate CMI? Sum(DRG weight * discharges)/Sum (discharges