Home
Browse
Create
Search
Log in
Sign up
Upgrade to remove ads
Only $2.99/month
Statistics GAT Review
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (37)
Average
Any one of several measures designed to reveal the central tendency of a collection of data
Categorical Data
Data that can be sorted into different categories distinguished by a nonnumeric characteristic
Continuous Data
Data resulting from infinitely many possible values that can be associated with points on a continuous scale in such a way that there are no gaps or interruptions
Descriptive Statistics
Methods used to summarize the key characteristics of known population data
Five-number summary
Minimum score, maximum score, median, lower quartile, upper quartile
Interquartile Range(IQR)
Difference between the third and first quartiles
Lower Quartile(Q1)
Median of the lower half of all scores (from the minimum score up to and including the original median); used in a boxplot
Mean
Sum of a set of scores divided by the number of scores
Median
Middle value of a set of scores arranged in order of magnitude (value).
Mode
Score that occurs most frequently
Population
Complete and entire collection of elements to be studied
Quartiles
The three values that divide ranked data in four groups, with approximately 25% of the scores in each group
Random Sample
Sample selected in such a way that every member of the population has the same chance of being chosen
Range
Measure of dispersion that is the difference between the highest and lowest scores.
Sample
Subset of a population
Upper Quartile(Q3)
Median of the upper half of all scores (from the original median up to the maximum score); used in a boxplot
Bell-Shaped
Many sets of data have a bell shape. We often describe data sets in terms of how they vary from this bell shape.
Bimodal
Two peaks (of approximately) the same height.
Distribution
Refers to the way the data is spread out on the number line.
Gaps
Intervals where there are no data between the low and high.
Outlier
A value that is far from the rest of the data
Variability
Refers to how much the data is spread out on the number line
Test For Outliers
-1.5 times the interquartile range + third quartile
-First quartile - 1.5 times the interquartile range
Example:
Q1 = 5
Q3 = 8
IQR = 3
1.5 times 3 = 4.5
4.5 + 8 = 12.5
5 - 4.5 = 0.5
Any data point less than 0.5 or greater than 12.5
is an outlier. In this set, 15 is an outlier.
Line Plot
Possible data values are listed on the x axis. An X goes for every element of the corresponding value.
Dot Plot
Possible data values are listed on the x axis. A dot goes for every element of the corresponding value.
Bar Graph
A bar graph shows the frequency of specific data values in a data set.
Circle Graph(or pie chart)
A circle divided into parts. Each section represents the percentage of the data elements.
Stem Plot(stem and leaf plot)
Plot that seperates data by 10's. Stems represent each 10 value and the leaves are the 1 value.
Histogram
a diagram consisting of rectangles whose area is proportional to the frequency of a variable and whose width is equal to the class interval.
Box Plot ( box and whiskers plot)
Constructed by marking the 5 point summary
Line Graph
Continuous(usually) graph that shows change overtime.
Scatter plot
a graph in which the values of two variables are plotted along two axes, the pattern of the resulting points revealing any correlation present.
How to find Standard Deviation
What percentage of data is found within the first standard deviation?
68%
What percentage of data is found within the second standard deviations?
95%
What percentage of data is found within the third standard deviations?
99.7%
What percentage of data is found within the fourth standard deviations?
100%
THIS SET IS OFTEN IN FOLDERS WITH...
GAT Midterm
43 terms
Cones and Cylinders
31 terms
GAT Final Q3
145 terms
GAT Final Q4
83 terms
YOU MIGHT ALSO LIKE...
Mathematical Terms - Algebra 1
40 terms
ca8
15 terms
Algebra 1 Unit 1 Statistics Review
25 terms
Unit 4 - Inferences About Populations
36 terms
OTHER SETS BY THIS CREATOR
Bio Exam Review
88 terms
Meiosis/ Genetics Review
26 terms
Protein Synthesis Review
30 terms
Respiration Review
23 terms