Statistical or Not
What is the Median?
0.7, 1.06, 1.06, 5, 6, 7, 25.17, 59.59, 70
6
What is the range 1.7 3 4 5 7 10 17 19 35.3
35.3 - 1.7 = 33.6
This type of plot uses X’s or dots stacked above numbers to show how often data values occur.
What is a dot plot.
Requirements for a Statistical Question
Multiple Answers; not a yes or no question
What is the range? 33 4 29 5 10 6 15 18 17 19 21
33 - 4 = 29
This type of graph groups data into intervals, or bins.
What is a histogram
What is the upper extreme 15 10 20 25 5
25
Is this a statistic question? What is the typical favorite sport of WTA student?
Yes
What is the IQR ? 29 34 39 43 73 91 198
91 - 34 = 57
In a histogram, this tells how many data values fall into each interval.
What is the height of the bar (or frequency)?
Is this a statistical question? Does the Evans family watch TV?
no
What's the IQR? 49, 35, 69, 53, 70, 77, 84
77- 49 = 28
This type of plot shows the median, quartiles, and range of a data set.
What is a box-and-whiskers plot.
What is Quartile 3? 1 6 3 4 5 2
5
Is this statistical? "What is the shoe size of the student with the largest feet in our grade?”
No
What is the average grade for a student who's grades are: 13, 27.3, 69, 69, 23, 97.
49.7
Find the IQR. 30, 45, 46, 72, 78, 89, 99, 100, 100
Median = 78 q1 = 45.5 q3 = 99.5 iqr = 99.5-45.5 = 54
A dot plot shows shoe sizes: most dots are between sizes 6 and 8, but one dot is at size 13.
This dot is an example of this.
What is an outlier
The percentage of data is in each of the 4 sections of a box and whisker plot?
What is 25%