# Health Statistics Exam 1

 Statistics Involves the techniques and procedures dealing with collection, organization, analyzing, interpretation, and presentatino of data Three Components of Health Fields 1. Education- basic and applied knowledge2. Clinical Practice- Deal with patient3. Research- expand knowledge Goal of Statistics in the Health Field Improve Health ProfessionImprove serviceImprove treatment and prevention of disease and disorders Descriptive vs. Inferential Statistics Descriptive- Use data to describe sampleInferential- Use sample data to make conclusions about the population Causation vs. Assocation Causation- When on variable directly affects anotherAssociation- When two variables have a strong observed connection Lurking Variable A "hidden factor" that can influence other variables. Tables An orderly arrangement of values grouped in to rows and columns Disadvantage of use of Tables Since they are not very interesting, tables should be used sparingly Advantage of using Tables Displaying information related to several levels of a variable Row vs. Column Row- acrossColumn- down Types of Tables One variableTwo or more variable Pie Chart Emphasizes each category's relation to the wholeChart must be incluseUseful for qualitative data Bar (Column) Charts One-VariableGrouped (or two or more variable) Stacked bar graph Grouped bar chart in which the separate groups are colored coded and graphed together Scatter diagram A graphic technique used to display the relationship between to continuous variables. Line graphs Used to display trends Ratio Relationship between one quanitity to another. Numbers are expressed as a fraction or separated by a colon. Proportion Relationship between one quanitity and the whole Percentage Proportion x's 100 Frequency Table View the distribution of data as it is sorted within each class Class Interval Which class has the lowest frequency Array Arrangement- order Interval midpoint What is the midpoint of that class Class width 24-26, 24, 25, 26- 3 the number of classes within a class Stem and Leaf Plot Construct by writing the first digits in the first column- stem.Write the second digits of all the numbers relating to each of the first digits- leaf Histogram Plot of the frequency distribution table Frequency Polygon Same as historgram, except connect midpoint of class to make continuous line Experiment Advantages Researcher designs and imposes treatmentsBest way to demonstrate causationResearcher has control over subjects Experiment Disadvantages EthicsExpense Survey advantages Factors being studied already existQuickest and cheapest way to collect dataMore acceptable to conduct on humans Survey disadvantages Less able to account for lurking variables Subject People bein gstudied, people we get data from. Represent population. Treatment Conditions we impose Control Status quo, normal or no treatment. Placebo treatment Subject is unaware they are not being treated Sham procedure Mimick a procedure Single-blind study Subject doesn't know what group they are in Double-blind study Neither the subject nor the researcher know treatment assignments Clinical Trial Experiment conducted on humans. Why do a literature review? Interest in TopicDesign projectBackground/rationale project introductionCompare your project results AuthorAnonymous ID63452 Card SetHealth Statistics Exam 1 DescriptionHealth Statistics Exam 1 Updated2011-02-01T20:21:35Z Show Answers