Terms : Hide Images
| 14738205231 | observational study | observes individuals and measures variables of interest but does not attempt to influence the responses; watching | 0 | |
| 14738211894 | When does confounding occur? | 2 variables are associated in such a way that we cannot distinguish the effects of one from the other | 1 | |
| 14738232970 | To identify a possible confounding variable, you must.... | 1. specify the possible confounding variable 2. explain how this variable is connected within the explanatory variable 3. explain how it could be effecting the response | 2 | |
| 14738249085 | Treatment: | specifically what is being done to survey results | 3 | |
| 14738265271 | Experimental Units/ subjects | the smallest collection of individuals to which treatments are applied | 4 | |
| 14738270543 | 4 Principles of Good Experimental Design | Control, comparison, random assignment, replication | 5 | |
| 14738286818 | completely randomized design | the treatments are assigned to all the experimental units completely by chance; similar to SRS | 6 | |
| 14738290722 | randomized block design | the random assignment of experimental units to treatments is carried out separately within each block; similar to stratified sampling | 7 | |
| 14738298834 | matched pairs is a form of blocking where | The idea is to match pairs of similiar exp units. Use chance to decide which member sex the first or second treatment first (in what order) | 8 | |
| 14738308985 | placebo effect | a response to a fake treatment | 9 | |
| 14738322983 | statistically significant | an observed effect so large that it would rarely occur by chance | 10 | |
| 14738332073 | Population | If experimental units were randomly selected from the greater population | 11 | |
| 14738361688 | Cause/effect | If treatments were randomly assigned to experimental units | 12 | |
| 14738372775 | Inference | the process of taking sample data and using it to come to a conclusion about the population | 13 | |
| 14738381566 | study would show bias if | the study consistantly underestimated or overesimated the value | 14 | |
| 14738384917 | convenience sample | choosing individuals from the population who are easy to reach | 15 | |
| 14738390332 | voluntary response sample | A sample which involves only those who want to participate in the sampling | 16 | |
| 14738398227 | random sampling | a sample that fairly represents a population because each member has an equal chance of inclusion | 17 | |
| 14738401604 | simple random sample | every member of the population has a known and equal chance of selection | 18 | |
| 14738403448 | stratified random sampling | classify each population into groups with similar traits. Choose a SRS from each group. That is the sample | 19 | |
| 14738408125 | cluster sample | classify population into groups based on who is located near each other. Gather data from all of a whole cluster | 20 | |
| 14738417975 | Undercoverage | occurs when some groups in the population are left out of the process of choosing the sample | 21 | |
| 14738419428 | nonresponse bias | when an individual chosen for the sample can't be contacted or refuses to cooperate | 22 | |
| 14738425928 | response bias | lie or not remember information Based on gener, race, behavior. | 23 |
