Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size Small Size show me how

Normal Size Small Size show me how

# QMP Vocab Week #1

Term | Definition |
---|---|

Hypothesis | statement of the relationship among variables, not a question |

Operational definition | exactly how to measure the variable |

Collect Data | results of an experiment in numbers, needs to be usable |

Analyze results | getting the numbers through formulas |

Interpret results | the meaning, relating back to hypothesis |

Share results | publish or make public knowledge your findings |

Statistics | a set of tools concerned with the collection, organization, and analysis of data, has two branches: descriptive and inferential |

Data | the numbers |

Descriptive | describes data, ex. class average |

Inferential | to make inferences of the data, ex. our class average is all class averages on campus |

Variable | anything that can take on different values or amounts, two types: independent and dependent |

Independent | the researcher manipulates, control or experimental group, used to group people |

Dependent | measurement of behavior, effect not cause |

Correlation | relationship between two variables |

population | complete collection of anything, regardless of size of collection |

sample | subset of population, measured to talk about populations, goal to be unbiased |

mean | mew |

number of anything | N |

parameters | numerical summary characteristics of population, can measure about a populations |

statistics | numerical summary characteristics of a sample |

mean of sample | - over x |

scaling | the assigning of numbers to objects or events |

4 scales of measurements | nominal scale, ordinal scale, interval scale, ratio scale |

nominal scale | assigns a name or label to objects or events, can be #'s, ex. barcodes |

ordinal scale | objects or events in rank order, just rank alone, not equality, ex. favorite bands |

interval scale | equal intervals between number, ranks are equal, ex. degrees f to c |

ratio scale | zero means absence of measurements, true zero, ex. height |

Frequency Distribution | creating a table of the data that shows the number of times a given group of scores occurs, construction varies, all have x and f columns, |

x | variable |

f | frequency |

cf | cumulative frequency |

cumulative frequency | number of times a value occurs up to and including that frequency |

rf | relative frequency |

relative frequency | the proportion of people on each row, always adds to one |

percentage | rf x 100 |

crf | cumulative relative frequency |

cumulative relative frequency | rf up to and including all values, add to one |

c% | crf x 100, % of people up to and including any score level |

results of frequency distribution | lost almost all richness, organized |

graphing | must label axis, y axis should be 3/4 that of x axis, y axis should use full range, always start y axis at zero |

histogram | bars touch, good with graphed frequency distribution |

line graph | connect the points |

Created by:
stophammertime1290