Chapter 2 , Pages 27-42
Terms : Hide Images
| 467425177 | Observational | collects data by observing characteristics( .i.e. survey ) . Looks for association. | |
| 467425178 | Experimental | collects data by manipulating variables or controlling something. Looks for cause-and-effect. | |
| 467425179 | Simple Random Sample (SRS) | each observational unit has an equal chance of being selected. (Think each observational unit being assigned a number 1-10 then put in a number generator , will pick numbers 1,4,7.2.) | |
| 467425180 | Stratified | Samples chosen from artificial/assigned sub-populations | |
| 467425181 | Systematic | asking every nth person. | |
| 467425182 | Cluster | samples chosen form natural groups | |
| 467425183 | Convience | asking your friends at lunch , just don't do it . | |
| 467425184 | Selection Biases | tendencies form samples to differ because of systematic ecxulsion of a percent of the populations | |
| 467425185 | Measurement Bias | tendencies for samples to differ because of how or whom is taking the samples. | |
| 467425186 | Nonresponse Sample | tendency for samples to differ in population because data is missing, due to unresponsive population. | |
| 467425187 | Sampling without Replacement | after a sample being selected from population sample can not be chosen again. | |
| 467425188 | Sampling with Replacement | after a sample being selected from a population it has a equal chance of being chosen again. | |
| 467425189 | confounding variable | (takes place in observational study ) a variable that shows up in the experiment, other than the one being tested , that might otherwise effect the conclusion of the study . | |
| 467425190 | observational | a study found that 3 and four year olds drinking something sweet twice a day doubled there risk of being overweight the next year. | |
| 467425191 | experimental | a study ,of 3 and four year olds , where put into two groups, one was given fruit juice three time a day , for a year the other given water and milk , for a year. The study found that the juice group where twice as likely to be overweight as the other groups. | |
| 467425192 | observational | Do students change social groups at payton? | |
| 467425193 | experimental | What foods are more likely to cause morning sickness? | |
| 467425194 | observational | Do homes with internet what less television? | |
| 467425195 | experimental | What factors influence a bigger tip at restaurants? | |
| 467425196 | Selection Bias | Survey people about the environment as they come out of Starbucks. | |
| 467425197 | Selection Bias | Surveying people listeners on a radio show about election outcome. | |
| 467425198 | Measurement Bias | A police officer of CPD asking if you have ever committed a misdemeanor , in a random survey. | |
| 467425199 | Measurement Bias | Asking your best friends if it is okay to date their younger sisters. | |
| 467425200 | Non-response Bias | Sending a survey through junk mail. | |
| 467425201 | Simple Random Sample | A teacher pulling names from a hat for who gets to take the class turtle home. | |
| 467425202 | Stratified Sample | The tier system for selective enrollment. | |
| 467425203 | Convience | Asking your friends what dress you should wear to prom. | |
| 467425204 | Systematic | Security searches every 7th person at the Usher concert. | |
| 467425205 | Cluster | Selecting two advisories from each grade to survey about the longer school day. |
