classboundaries | | cumulative frequencies used instead of the individual class frequencies |

classwidth | | standard score |

deciles | | is a graph showed by slices of a pie |

bimodal | | sum of the frequencies for that class and all previous classes |

dotplot | | the number of values in the data set |

rangeruleofthumb | | consists of the minimum value; the 1s quartile,Q1; the median, or 2nd quartile;Q2,the 3rd quartile, Q3, maximum value |

outlier | | is a variation of values about the mean |

median | | denoted bt D1,D2,D3,.........,D9 |

exploratorydataanalysis | | distribution that is approximately bell-shaped |

inferentialstatistics | | are the largest numbers that can belong to the different classes |

cumulativefrequency | | is a value that is located very far away from almost all of the other values |

chebyshev'stheorem | | is a bar graph for qualitative data, with the bars arranged in order according to frequencies |

frequencytable | | are the smallest numbers that can belong to the different classes |

empiricalrule | | is number obtained by adding the values and dividing the total by the number of values |

relativefrequencies | | is a mean computed with the different scores assigned different weights |

classmidpoints | | are midpoints of the classes |

mode | | the mean and median are to the right of the mode |

relativefrequencytable | | if not symmetric and if it extends more to one side than the other |

relativefrequencyhistogram | | two values occur with the same greatest |

frequency | | uses line segments connected to points located directly above class midpoint values |

skewed | | denoted by Q1,Q2, andQ3 |

ogive | | more than two values occur with the same greatest frequency |

negativelyskewed | | difference between the value and the mean |

variance | | data values is plotted as a point along a scale of values |

meanabsolutedeviation | | is a value at the center or middle of a data set |

boxplot | | or a box-and-whisker diagram |

quartiles | | ___ or z score |

standardscore | | separating each value into parts; the stem and the leaf |

measureofcenter | | no more than 1/k2 of the values are more than k standard deviations away from the mean. |

piechart | | middle value |

descriptivestatistics | | value that occurs most frequently |

unbiasedestimator | | highest value - lowest value |

paretochart | | if the left half of its histogram is roughly a mirror image of its right half |

histogram | | measure of variation equal to the square of the standard deviation |

5-numbersummary | | is a line graph that depicts cumulative frequencies |

lowerclasslimits | | is the difference between two consecutive lower class limits or two consecutive lower class boundaries |

multimodal | | vertical scale is marked with relative frequencies |

range | | sample data to make inferences about a population |

upperclasslimits | | dividing each class frequency by total of all frequencies |

cummulativefrequencytable | | divide that sum by the number of sample values |

mean | | = highest value lowest value/ 2 |

standarddeviation | | sample variance s^2 |

positivelyskewed | | an average |

weightedmean | | summarize or describe the important characteristics of a set of data |

midrange | | denoted by P1,P2,.........,P9 |

zscore | | are the numbers used to separate classes, but withou the gaps created by class limits |

arithmeticmean | | is the process of using statistical tools to investigate data set in order to understand their important charcteristics |

percentiles | | the mean and median are to the left of the mode |

scatterdiagram | | lists classes of values, along with counts |

steam-and-leafplot | | is a plot of the paired (x,y) data with a horizontal x-axis and a vertical y-axis |

deviation | | same class limits as a frequency table,but relative frequencies are used |

frequencypolygon | | sample values lie within 2 standard deviation of the mean |

symmetric | | the number of original scores that fall into that class |

samplesize | | is a bar graph in which the horizontal scale represents classes and the vertical scale represents frequencies |