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CHDA Domain 3 (Data Analysis) Exam Questions And Answers
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CHDA Domain 3 (Data Analysis) Exam Questions And AnswersAmong the following computer software programs, which is most suitable to perform
comprehensive statistical testing of data?
SPSS
3 choices
Non-parametric tests, like the Kruskal-Wallis, have which of the following advantages
compared with their parametric versions?
They assume less
3 choices
Which of the following is a description of the strength of a relationship between 2
continuous variables that describes the degree to which data points fall on a line?
Correlation
3 choices
Your CMO has asked you to monitor patient satisfaction over time in a fashion which
tries to distinguish routine variation from true underlying changes over time. Of the
below options, the best tool to select 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 choice options
How do you compute range?
Max - Min
The type of statistical procedures used to draw inferences 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-ex: 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 null hypothesis-when the test statistic is > your critical value
3 choices
A health plan analyst wants to determine if the readmission rates between two hospitals
of interest are statistically different. What type of hypothesis test will the analyst use?
Two-sample z-test for proportions
3 choices
A researcher is interested in testing the null hypothesis that LOS at two hospitals are
equal. What statistical test should the researcher use in this scenario?
-t-test for means
3 multiple choice options
We want to compare the average weight of patients both before and after a particular
specialty diet is administered. We think that the weight will go down after administration
of the diet. Which of the following tests do you want to conduct to test if the average
weight for each patient is less at the end of the diet?
Paired t-test
3 multiple choice options
The variable which may cause the variation within a second variable is referred to as the
____
Independent variable one which is utilized in prediction is called the independent and
also the outcome variable is referred to as dependent
3 multiple choice options
If the correlation between experience in years and salary itself is positive then what
might you conclude regarding the slope of regression line that might fit to describe the
relationship?
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