Math Vocab Quiz
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Q1 First Quartile Lower Quartile | The median of the lower(first)half of a data set.
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| 5-point summary | The lower extreme value
The first quartile
The Median
The third quartile
The upper extreme value
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| biased sample | A sample in which members are not randomly selected
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| box plot (box-and-whisker-plot) | A graphical display of the five point summary
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| inference | a conclusion about a population made by projecting the results or a representative sample onto the whole population
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| interquartile range | The difference between Q3 and Q1
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| leaf | the least digit in each item of a data set when displayed in a stem and leaf plot
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| Q2 Median Second Quartile | The middle value of a data set
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| MAD | The average distance of the data values from the Mean
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| measure of variation | How the data varies between quartiles and other important data points. A measure of the spread of data from a measure of center
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| population | All the members or objects about which you want information
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| random sample | a set of data randomly selected from a population so that every member of the population has an equal chance of being selected
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| range | the greatest value minus the least value in a data set
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| sample | a set of data taken from a population
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| sample size | The number of members in a sample
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| Q3 Upper Quartile Third Quartile | The median of the upper(second)half of a data set
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| simple random sampling | a sampling method in which every member of the population has an equal chance of being selected
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| stem | all digits except for the one of the least place value in an item of data displayed in a stem and leaf plot
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| stem-and-leaf plot | a two-column graphical display in which the least digit of each item is displayed on the right and the other digits in the left
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| stratified random sampling | a sampling method in which the population is divided into non overlapping groups from which members are randomly selected
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| systematic random sampling | a sampling method in which the first member is randomly selected and the subsequent members are selected at regular intervals
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| unbiased sample | same as a random same
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