Chapter 9 Vocab
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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| 5 point summary | Consists of 5 data values, lower extreme, upper extreme, lower quartile, upper quartile, and median
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| Biased Sample | A sample in which members are not randomly selected
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| Box Plot | A graphical display of a 5 point summary ( uses 5 data values)
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| Box and Whisker Plot | A graphical display of a 5 point summary
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| First Quartile | Also known as the lower quartile. It is the median of the lower half of the data set
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| Interquartile Range | Difference between the first and the third quartile
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| Leaf | The least digit in each item of the data set, when displayed in a stem and leaf plot.
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| Lower Quartile | The median of the lower half of a data set. 25% of the data fall on or below this value
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| Mean Absolute Deviation | The average distance of each item of data from the mean
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| Measure of variation | 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 difference between the greatest and the least values 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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| second quartile | the median of a data set. 50% of the data fall on or below this value
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| simple random sampling | a sampling method in which every member of a population has an equal chance of being selected
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| stem | all digits except the one of 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 of data is displayed in the right column and the other digits in the left column
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| stratified random sampling | a sampling method in which the population is divided into nonoverlapping 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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| third quartile | the median of the upper half of a data set, also known as the upper quartile. 75% of the data fall on or below this value
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| unbiased 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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| upper quartile | the value in a data set that 75% of the data fall on or below this value also known as quartile 3
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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