Shared Flashcard Set

Details

Algebra 2 Statistics
13.1 to 13.3
23
Mathematics
11th Grade
05/03/2023

Additional Mathematics Flashcards

 


 

Cards

Term
Measures of Central Tendency
Definition
Mean, median, and mode are values that describe the center of a data set.
Term
Mean
Definition
center of a data set. Mean The sum of the values in a set divided by the number of values, usually seen as x¯
Term
Median
Definition
When a set is ordered numerically, the middle value or the mean of the two middle values.
Term
Mode
Definition
The value or values that occur most often. A data set may have no mode, one mode, or several modes.
Term
Box-and-Whisker Plot
Definition
Shows the spread of a data set for 5 key points: the minimum and maximum values, the median, and the first and third quartiles.
Term
Quartiles
Definition
The medians of the lower and upper halves of the data set. If there are an odd number of data values, do not include the median in either half.
Term
Interquartile Range
Definition
IQR is the difference between the 1st and 3rd quartiles, the middle 50% of the data.
Term
Outlier
Definition
A data value that is substantially different from the rest of the items in the data set.
Term
Measures of Variation
Definition
Describe how the data in a data set are spread out (range, interquartile range, standard deviation).
Term
Range
Definition
The difference between the greatest and least values.
Term
Interquartile Range
Definition
IQR is the difference between the 1st and 3rd quartiles, the middle 50% of the data.
Term
Standard Deviation
Definition
A measure of how each value in a data set varies, or deviates, from the mean. The Greek letter (sigma) represents standard deviation.
Term
Statistic
Definition
A number that describes or summarizes a sample
Term
Parameter
Definition
A number that describes a population
Term
Sample
Definition
Gathers information from only part of a population
Term
Margin of Error
Definition
An estimate of error in sample proportion based on the standard deviation. The larger the sample size, the smaller the margin of error.
Term
Sample Proportion
Definition
The ratio of the number of times an event occurs, x, to the sample size, n.
Term
Random
Definition
Each individual in the population has an equal chance of being selected.
Term
Self-selected
Definition
Members volunteer to participate.
Term
Convenience
Definition
Members are chosen because they are easily accessible
Term
Systematic
Definition
Members are chosen using a rule, such as every nth person in the population.
Term
Stratified
Definition
The population is first divided into groups. Then members are randomly chosen from each group.
Term
Cluster
Definition
The population is first divided into groups. A sample of the groups is randomly chosen.
Supporting users have an ad free experience!