Grade 7 & 8 Data Analysis Flashcards
Mean
add the numbers in a set, then divide by the number of numbers in the set
Median
middle number in a set listed from least to greatest
Mode
most frequently occurring number(s) in a set
Range
difference between greatest and least numbers in a set
Types of Charts and Graphs
number line
circle graph
bar graph
line graph
scatter plot
picture graph
frequency chart
Venn diagram
stem-and-leaf plot
box-and-whisker plot
Probability
a number between 0 (impossible) and 1 (certain) that describes how likely an outcome is to occur
Sample Space
list of individual outcomes that are possible
Combination
a selection of objects from a set, the order of the objects doesn’t matter (r objects from a set of n objects)
C = n!/r!(n-r)!
Permutation
a selection of objects from a set, the order of objects DOES matter (k objects from a set of n objects)
P = n!/(n-k)!
Roman Numerals
1 = I
2 = II
3 = III
4 = IV
5 = V
6 = VI
7 = VII
8 = VIII
9 = IX
10 = X
50 = L
100 = C
500 = D
1000 = M
bar graph
a type of graph in which the lengths of bars are used to represent and compare data in categories
box and whisker plot
a diagram that summarizes data using the median, the upper and lower quartiles, and upper and lower extremes.
Constant
Numeric value that does not change
discount
a decrease in the price of an item
experimental probability
probability based on what happens when an experiment is actually done
favorable outcome
the outcome you would perfer happen
frequency table
A table that lists items together according to its interval which is the number of times, or frequency, that the items occur
histogram
A bar graph where the bars touch, where the height of each bar indicates its frequency, and where data is grouped into intervals
interest
is the amount paid for borrowing or lending money
markup
the amount the price of an item is increased above the price the store is paid for the item
odds
the ratio of the number of ways the event can occur to the number of ways the event cannot occur. Favorable over Unfavorable.
percent
a ratio whose denominator is 100
pie graph
a graph that best shows part of a whole or the percentage out of 100%
principal
the original amount of money loaned or borrowed
probability of an event
number of favorable outcomes divided by total number of possible outcomes
stem and leaf plot
A data display that shows groups of data arranged in order by place value.
theoretical probability
what should occur in a probability experiment…an experiment is not actually done
