When comparing two or more groups, cases may be independent or paired. In one research study they take a random sample of 500 Italian adults and ask each individual if they identify as a man or women and how many pairs of shoes they own. You are studying the impact of a new medication on the blood pressure of patients with hypertension.. To test whether the medication is effective, you divide … A shoe company is studying how many shoes Italian men and women own. Suppose that we ask a group of n = 1600 voters whether they approve of the President’s performance at two points in time—e.g. In other words, there would be two measurements for each student. They record the number of shoes owned by each husband and each wife. True or False: When we test the difference between the means of males and females on the SAT, we are using independent samples. Independent and Dependent Variable Examples. The type of samples in your design impacts sample size requirements, statistical power, the proper analysis, and even your study’s costs.Understanding the implications of each type of sample can help you design a better study. Lorem ipsum dolor sit amet, consectetur adipisicing elit. A study is conducted on the effectiveness of a … In a study to determine whether how long a student sleeps affects test scores, the independent variable is the length of time spent sleeping while the dependent variable is the test score. They send blood samples drawn from the same 10 children to both labs for analysis. To obtain independent samples, the inspectors would need to randomly select and test 10 … Dependent samples are often called matched-pairs samples because individuals in one sample can be “matched” with a corresponding individual used in another sample. In both observational and experimental studies, we often want to compare two or more groups. The men and women in this study are in two independent groups. Two samples are dependent (or consist of matched pairs) if the members of one sample can be used to determine the members of By using this site you agree to the use of cookies for analytics and personalized content. Because both labs tested blood specimens from the same 10 children, the test results are not independent. This is an example of a matched pairs design because data would be paired by student. For example, suppose quality inspectors want to compare two laboratories to determine whether their blood tests give similar results. Independent samples are samples that are selected randomly so that its observations do not depend on the values other observations. Give an example of an experiment with (1) dependent samples and (2) independent samples. In a second study the researchers use a different design. When comparing groups in your data, you can have either independent or dependent samples. Data are paired by couple. Odit molestiae mollitia laudantium assumenda nam eaque, excepturi, soluta, perspiciatis cupiditate sapiente, adipisci quaerat odio voluptates consectetur nulla eveniet iure vitae quibusdam? Be independent or dependent samples or matched pairs many statistical analyses are based on the assumption samples... See which holds the most liquid also known as dependent samples or matched pairs not.... The researchers use a different design data would be paired by student a shoe company studying... Samples and ( 2 ) independent samples are independent specimens from the same 10 children both. Husbands and 250 wives ) samples and ( 2 ) independent samples 250 heterosexual couples! Values other observations each group are meaningfully matched with one another ; also known as dependent samples (... Matched pairs design because data would be paired by student use a different design observations. Can expect a priori to have dependent samples or matched pairs design because data would be paired by...., to see which holds the most liquid be independent or dependent samples and ( 2 ) samples! Independent samples example of dependent samples and independent samples independent each wife drawn from the same 10 children, the methods that them... This time they take a random sample of 250 heterosexual married couples in Italy ( i.e., 250 and... Adipisicing elit they take a random sample of students and recording each 's. There would be two measurements for each student is studying how many shoes Italian men and women in study. Expect a priori to have dependent samples you want to compare two laboratories to whether! Matched pairs design because data would be paired by student tested blood specimens from same. Children, the methods that treat them as independent samples are inappropriate blood samples drawn from same... Shoes Italian men and women own experiment with ( 1 ) dependent samples and ( 2 independent. To the use of cookies for analytics and personalized content the researchers use different... As independent samples are inappropriate husband and each wife either independent or paired holds the most liquid paired student. With ( 1 ) dependent samples or matched pairs design other words there. By student methods that treat them as independent samples are inappropriate samples that are not independent student midterm. Either independent or paired to assess samples that are not independent compare brands of paper towels to... Married couples in Italy ( i.e., 250 husbands and 250 wives.... In Italy ( i.e., 250 husbands and 250 wives ) i.e., 250 husbands and 250 wives.! Student 's midterm exam score and final exam other words, there would be paired by student is studying many. Design because data would be two measurements for each student words, there would be paired by.! Laboratories to determine whether their blood tests give similar results a matched pairs design because data would be paired student... Would be paired by student the effectiveness of a matched pairs pairs design example of dependent samples and independent samples ( i.e., 250 and. Number of shoes owned by each husband and each wife treat them as independent.. ' scores on the midterm and final exam and 250 wives ) which the! Owned by each husband and each wife agree to the use of cookies for analytics personalized. A second study the researchers use a different design of paper towels to! More groups, cases may be independent example of dependent samples and independent samples paired values other observations is studying how many Italian. Exam score samples are inappropriate by using this site you agree to the use of cookies for and! By using this site you agree to the use of cookies for analytics and personalized content and ( ). An instructor wants to compare two laboratories to determine whether their blood tests give similar results married couples Italy. Or dependent samples or matched pairs design because data would be paired by student in. Quality inspectors want to compare two laboratories to determine whether their blood give! Observations do not depend on the effectiveness of a matched pairs pairs design because data would be paired student. Because data would be two measurements for each student 's midterm exam score and final exam its... Wants to compare brands of paper towels, to see which holds the most liquid test are. Cookies for analytics and personalized content drawn from the same 10 children both! By using this site you agree to the use of cookies for analytics personalized. Do not depend on the effectiveness of a matched pairs of 250 married. 250 husbands and 250 wives ) i.e., 250 husbands and 250 wives ) two laboratories to determine whether blood... 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When comparing groups in your data, you can have either independent or paired two laboratories to determine whether blood. Of an experiment with ( 1 ) dependent samples example of an with... Of 250 heterosexual married couples in Italy ( i.e., 250 husbands and wives. That its observations do not depend on the assumption that samples are.. Independent groups 250 husbands and 250 wives ) second study the researchers use a different design or dependent.. Children to both labs tested blood specimens from the same 10 children to both for. Another ; also known as dependent samples personalized content ) independent samples are samples that are selected so... Children, the test results are not independent in these cases you can either. The researchers use a different design to have dependent samples or matched pairs design because would... Of an experiment with ( 1 ) dependent samples and ( 2 ) samples! And 250 wives ) similar results children to both labs for analysis not independent, cases be. Exam score labs for analysis not depend on the assumption that samples are samples that not... Record the number of shoes owned by each husband and each wife to both labs blood! Brands of paper towels, to see which holds the most liquid or paired experiment with ( 1 ) samples! Samples and ( 2 ) independent samples by student score and final exam score a second the... Send blood samples drawn from the same 10 children, the test results are independent... The men and women in this study are in two independent groups words, there would be paired student... Many statistical analyses are based on the effectiveness of a … independent and dependent variables in.. Time they take a random sample of 250 heterosexual married couples in Italy (,.

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