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Mean, Median, Mode
Range and IQR
Displays (Challenging)
Analyzing Dot Plots, Box Plots, or Histograms
100
What is the median?
24, 33, 4, 5, 6,10,15,17, 18, 19, 21, 29
4,5,6,10,15,17,18,19,21, 24, 29,33
1st) Order smallest-----greatest
2nd) Find # in the middle
17.5= Median
100
Whats the mean? 1, 1, 2, 3, 4, 4, 5, 6, 7, 8
41/10= 4.1
100
What is the range of the following data set:
5, 10, 17, 19, 35.3, 33, 12, 4, 56 ,7, 1.7
BIGGEST- SMALLEST
35.3 - 1.7 = 33.6
100
What fraction or percentage of data is in each of the 4 sections of a box and whisker plot?
25%
100
How many people eat breakfast in 3 minutes?
5 people
200
What's the MODE?
10, 12, 16, 78, 90, 65, 78, 44, 64, 30, 100, 170, 44, 20, 72, 84, 44
44 (It occurs 3 times)
200
What is the median? 93, 47, 37, 49, 25, 12, 13, 57
(37 + 47)/2 = 42
200
Write down the 4 STEPS to find the IQR (interquartile range).
Order from least to greatest
1.) Find the median
2.) Find Q1 (the median of the first quartile)
3.) Find Q3 (the median of the third quartile)
4.) Subtract Q1 from Q3 (Q3-Q1)
200
Can you find the mean or AVERAGE using a Histogram?
No!
You need every single number in a data set to find the mean or average. A histogram only gives a RANGE of numbers, not exact.
200
Label the 5 things needed to make a box plot on the image below.
Min= 16 or 17
Q1= 50 or 51
Median= 68 or 69
Q3= 87
Maximum= 100
300
What's the RANGE?
10, 12, 16, 78, 90, 65, 78, 44, 64, 30, 100, 170, 44, 20, 72, 84, 44
100-10= 90
300
What is the median?
103, 2, 23, 156.5, 105.5, 145
104.25
300
If finding the IQR.... what is the first quartile (Q1) of this data set?
29 34 39 43 73 91 198
34
300
Is it possible to find the median given a frequency table?
Yes! If you write out each of the numbers in the correct frequency and order them from least to greatest then you can find the median.
300
What's the range of this data set?
Either
100-16= 84
or
100-17= 83
400
What is Miss Borseth's favorite breakfast food?
EGGS!!!
400
What is the mode? 1.06,9.3,59.59,6.01,25.17,1.06,6,1.06,0.7
1.06
400
If finding the IQR.... what is the third quartile (Q3) of this data set?
35, 49, 53, 69, 69, 77, 84
77
400
What is the first step you need to do to find the IQR or median?
Order the data!!
400
What is the mode for these student scores?
TWO MODES....because they both occurred for 10 students.
Between 41%-50% AND 71%-80%
500
Create a frequency table for the following numbers...
20, 20, 20, 19, 19, 18, 17, 17, 17, 17
Number: 17 18 19 20
Frequency: 4 1 2 3
500
What is the AVERAGE grade for a student who's grades are: 13, 27.3, 69, 69, 23, 97.
49.7
500
Find the IQR of the data set.
30, 45, 46, 72, 78, 89, 99, 100, 100
Median = 78
Q1 = 45.5
Q2 = 99.5
IQR= 99.5-45.5 = 54
500
Draw a box plot with......
A minimum of 4
A Q1 of 6
A median of 8
A Q3 of 10
A maximum of 15
I need to draw on board....lol
500
How many students scored between 81% and 100%?
5 students