Grade 7 & 8 Data Analysis

Question 1

Mean

Answer 1

add the numbers in a set, then divide by the number of numbers in the set

Question 2

Median

Answer 2

middle number in a set listed from least to greatest

Question 3

Mode

Answer 3

most frequently occurring number(s) in a set

Question 4

Range

Answer 4

difference between greatest and least numbers in a set

Question 5

Types of Charts and Graphs

Answer 5

number line
circle graph
bar graph
line graph
scatter plot
picture graph
frequency chart
Venn diagram
stem-and-leaf plot
box-and-whisker plot

Question 6

Probability

Answer 6

a number between 0 (impossible) and 1 (certain) that describes how likely an outcome is to occur

Question 7

Sample Space

Answer 7

list of individual outcomes that are possible

Question 8

Combination

Answer 8

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)!

Question 9

Permutation

Answer 9

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)!

Question 10

Roman Numerals

Answer 10

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

Question 11

bar graph

Answer 11

a type of graph in which the lengths of bars are used to represent and compare data in categories

Question 12

box and whisker plot

Answer 12

a diagram that summarizes data using the median, the upper and lower quartiles, and upper and lower extremes.

Question 13

Constant

Answer 13

Numeric value that does not change

Question 14

discount

Answer 14

a decrease in the price of an item

Question 15

experimental probability

Answer 15

probability based on what happens when an experiment is actually done

Question 16

favorable outcome

Answer 16

the outcome you would perfer happen

Question 17

frequency table

Answer 17

A table that lists items together according to its interval which is the number of times, or frequency, that the items occur

Question 18

histogram

Answer 18

A bar graph where the bars touch, where the height of each bar indicates its frequency, and where data is grouped into intervals

Question 19

interest

Answer 19

is the amount paid for borrowing or lending money

Question 20

markup

Answer 20

the amount the price of an item is increased above the price the store is paid for the item

Question 21

odds

Answer 21

the ratio of the number of ways the event can occur to the number of ways the event cannot occur. Favorable over Unfavorable.

Question 22

percent

Answer 22

a ratio whose denominator is 100

Question 23

pie graph

Answer 23

a graph that best shows part of a whole or the percentage out of 100%

Question 24

principal

Answer 24

the original amount of money loaned or borrowed

Question 25

probability of an event

Answer 25

number of favorable outcomes divided by total number of possible outcomes

Question 26

stem and leaf plot

Answer 26

A data display that shows groups of data arranged in order by place value.

Question 27

theoretical probability

Answer 27

what should occur in a probability experiment…an experiment is not actually done