Vocabulary
What is the "mode"
The number in the data set that is most repeated.
What 2 steps must be done in order to find the mean?
add and then divide.
What is the first step in finding the mean?
order from least to greatest.
The first step in constructing a box and whisker plot is?
Order from least to greatest.
If a two-way table is missing data from a "total" column or row, what mathematical operation would you use to find the answer?
addition
The average of the data set is called what?
mean
In this data set, I would divide by _______ in order to find the mean.
3, 8, 9, 12, 15
5
If you have two number in the middle what do you do?
add both numbers and divide by 2
Name the 5 parts that are needed for a box and whisker plot.
Least value, greatest value, Q1, Median, Q3
What month of the year has 28 days
All of them
What is the "median"
the number in the middle of the data set
Student A found the mean, what did student A do wrong?
2,8,9,0,5,6 = 30 divide by 5 = 6
Should divide by 6
Student A found the median and got 7, what did student A do wrong? And what is the correct median?
2, 3, 7 , 9 6
Didn't order correctly, median is 6
Each section of a box and whisker plot is how much percent?
25%
What was the number of boys who failed the test?
13
If I subtract the smallest number of the data set from the greatest number in the data set I'd be looking for the _____________?
range
Find the mean
10,8, 12,
10
Find the median
1, 9, 0 ,7 ,4, 3, 12
4
Use the following information to construct an accurate box and whisker plot.
Least value 2....Greatest value 15....Q1 4....Median 7....Q3 11
What is the number of girls who were surveyed
21
What type of plot has a q1, median, q3
box and whisker
7, 9, 0, 11, 8
7
Find the median
10, 12, 8, 6, 12, 4
9
What percent of the class scored less that 80%
See white board
75%
if a two-way table has data in the "total" column BUT missing the joint frequency from another column or row, what mathematical operation would you use to find the answer?
subtraction