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Quinnipiac University: Health Professions Biostatistics
Добавлен 8 май 2013
The goal of this channel is to allow health professions students to attain excellence in the foundational concepts of biostatistics.
Module 15 Hypothesis Tests
The goal of this session is to learn how to use parametric, nonparametric, and post hoc hypothesis tests.
The properties and characteristics of sample data determine which types of analysis can be appropriately performed on them. Parametric tests are those that make assumptions about the parameters (defining properties) of the population from which their sample data are drawn. Those assumptions include that the underlying source populations have a normal distribution and the sample data are from an interval or ratio scale and are alike with regard to variance. Most well-known elementary statistical methods are parametric.
Sometimes, researchers are confronted with experimental situations th...
The properties and characteristics of sample data determine which types of analysis can be appropriately performed on them. Parametric tests are those that make assumptions about the parameters (defining properties) of the population from which their sample data are drawn. Those assumptions include that the underlying source populations have a normal distribution and the sample data are from an interval or ratio scale and are alike with regard to variance. Most well-known elementary statistical methods are parametric.
Sometimes, researchers are confronted with experimental situations th...
Просмотров: 2 023
Видео
Module 11c Likelihood Ratios & Pretest/Posttest Probability
Просмотров 12 тыс.8 лет назад
The goal of this session is to to learn how to define and calculate likelihood ratios, and use them to calculate and interpret pretest/posttest probabilities. Likelihood ratios are used to assess how good a diagnostic test is and to help in selecting appropriate diagnostic test(s). - LRs have advantages over PPV and NPV because they are less likely to change with the prevalence of the disorder....
Module 11 - Biostatistics in Medical Decision-making
Просмотров 3 тыс.8 лет назад
The goal of this session is to to learn the statistical concepts that underpin and are used in medical decision-making. Medical decision-making requires the collection, evaluation, analysis, and use of quantitative and qualitative data from various kinds of tests. Medical tests are almost never perfect and so the data they yield may be accurate to varying degrees; therefore, in order to assess ...
Module 13 - Asking Questions Research Study Design
Просмотров 2 тыс.9 лет назад
The goal of this session is to learn how to design quantitative or qualitative studies to ask and answer research questions. Medical research typically aims to discover the relationship between one or more events or characteristics (e.g., being exposed to a toxic substance, having a family history of a certain disease, or taking a certain drug) and others (e.g., contracting or overcoming an ill...
Module 12 - Biostatistics in Epidemiology
Просмотров 2,4 тыс.9 лет назад
The goal of this session is to learn how basic epidemiological measurements can be used to develop a portrait of the overall health of groups of people and provide information about the risk of contracting a disease.
SPSS Video #16: Calculating Chi-square In SPSS
Просмотров 11 тыс.10 лет назад
This video demonstrates how to conduct Chi-square hypothesis tests using the statistical software program SPSS. SPSS can be used to calculate Chi-square tests for various types of data.
Module 17 - Non-parametric Tests
Просмотров 12 тыс.10 лет назад
Often, researchers are confronted with experimental situations that do not conform to the requirements of parametric tests. In these situations, it may not be appropriate to use a parametric test. This is particularly important because when the assumptions of a test are violated, the test may lead to an erroneous interpretation of the data. Most non-parametric tests do not state hypotheses in t...
Module 16 - Correlation & Regression
Просмотров 2,7 тыс.10 лет назад
It is common in biomedical research to investigate whether there is a relationship between two or more variables. For example, is there a relationship between maternal alcohol consumption and low birth weight, or between a physician's age and their willingness to incorporate new technology into their practice? The methods used to do this focus on the 'co-relatedness' of the two variables. The g...
SPSS Video #14: Calculating Correlation In SPSS
Просмотров 2,4 тыс.10 лет назад
This video demonstrates how to calculate correlation coefficients using the statistical software program SPSS. SPSS can be used to calculate regression coefficients for various types of data.
SPSS Video #15: Calculating Regression In SPSS
Просмотров 2,5 тыс.10 лет назад
This video demonstrates how to calculate regression coefficients using the statistical software program SPSS. SPSS can be used to calculate regression coefficients for various types of data.
SPSS Video #13: Calculating Two way ANOVA In SPSS
Просмотров 2,9 тыс.10 лет назад
This video demonstrates how to calculate Two-way ANOVA using the statistical software program SPSS. SPSS can be used to conduct Two-way ANOVA testing for various types of data.
SPSS Video #12: Calculating One-way ANOVA In SPSS
Просмотров 3,8 тыс.10 лет назад
This video demonstrates how to calculate One-way ANOVA using the statistical software program SPSS. SPSS can be used to conduct One-way ANOVA testing for various types of data.
SPSS Video #11: Calculating T-tests In SPSS
Просмотров 10 тыс.10 лет назад
This video demonstrates how to calculate one-sample, independent and repeated measures t-tests using the statistical software program SPSS. SPSS can be used to conduct t-test hypothesis testing for various types of data.
Module 14 - Bias & Confounders
Просмотров 3 тыс.10 лет назад
Although sample data are usually representative of the population, there is always the chance that the sample is misleading and will cause a researcher to make the wrong decision about the research results. The goal of this session is to learn the statistical concepts of bias and confounders and how they are used to reduce the risk of drawing incorrect conclusions.
Module 13 - Asking Questions: Research Study Design
Просмотров 89510 лет назад
The goal of this session is to learn how to design quantitative or qualitative studies to ask and answer research questions. Medical research typically aims to discover the relationship between one or more events or characteristics (e.g., being exposed to a toxic substance, having a family history of a certain disease, or taking a certain drug) and others (e.g., contracting or overcoming an ill...
Module 11c - Biostatistics in Medical Decision-Making: Likelihood Ratios
Просмотров 1,2 тыс.10 лет назад
Module 11c - Biostatistics in Medical Decision-Making: Likelihood Ratios
SPSS Video #10 - Obtaining Odds Ratio & Relative Risk In SPSS
Просмотров 346 тыс.10 лет назад
SPSS Video #10 - Obtaining Odds Ratio & Relative Risk In SPSS
SPSS Video #9: Obtaining An ROC Curve In SPSS
Просмотров 140 тыс.10 лет назад
SPSS Video #9: Obtaining An ROC Curve In SPSS
Calculating Sensitivity & Specificity with a 2x2 Table
Просмотров 12 тыс.10 лет назад
Calculating Sensitivity & Specificity with a 2x2 Table
Calculating PPV & NPV with a 2x2 Table
Просмотров 8 тыс.10 лет назад
Calculating PPV & NPV with a 2x2 Table
Module 11 - Biostatistics in Medical Decision-making
Просмотров 1,1 тыс.10 лет назад
Module 11 - Biostatistics in Medical Decision-making
Module 11b - Biostatistics in Medical Decision-Making: Clinical Application
Просмотров 1,9 тыс.10 лет назад
Module 11b - Biostatistics in Medical Decision-Making: Clinical Application
Module 1 - Introduction to Statistics
Просмотров 7 тыс.11 лет назад
Module 1 - Introduction to Statistics
Module 3 - Describing Data: Central Tendency
Просмотров 3,6 тыс.11 лет назад
Module 3 - Describing Data: Central Tendency
SPSS Video #3: Creating Frequency Distributions, Histograms & Barcharts In SPSS
Просмотров 12 тыс.11 лет назад
SPSS Video #3: Creating Frequency Distributions, Histograms & Barcharts In SPSS
Module 5 - Describing Data: Z-scores
Просмотров 7 тыс.11 лет назад
Module 5 - Describing Data: Z-scores
Module 4 - Describing Data: Variability
Просмотров 4,1 тыс.11 лет назад
Module 4 - Describing Data: Variability
SPSS Video #4: Measuring Central Tendency In SPSS
Просмотров 37 тыс.11 лет назад
SPSS Video #4: Measuring Central Tendency In SPSS
helpful thanks
Hey I have a biostat exam on Monday. Wish me luck.
All the best! Hope it goes well.
At 1:04 the NPV calculation should read NPV = 0.996 rather than 0.10. Apologies for the typo.
Do not forget to weight the data
+Ruslan Alali Took me a while to discover that!
nice presentation... looks great and is easy to follow.
Your lecture is very fine and essential for us
Thanks, helpful......... especially adding in weighted cases :-)
Thanks so much for this--very helpful!
thank you very helpful
Oh. Looks like you need to weight cases. See www.google.com.au/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0CCsQFjAC&url=http%3A%2F%2Fgchang.people.ysu.edu%2Fclass%2Fs5817%2FL%2FSPSSCrosstabW.pdf&ei=sjKOVKPCNIXh8gWX3oKQCg&usg=AFQjCNE_eKGULISRVUEzTajCj1JSfw2_CQ&sig2=5q5DzFcTIukGI8R0PRBYfA&bvm=bv.81828268,d.dGc
super helpful. thanks :)
Thank you for posting!
Great module!
You're right! Thanks for spotting that typo; I appreciate it.
example 5 is wrong answer: it is -8/2.5 equal -3.2 which is .0007