Measures of Center
Find the Median of:
3, 5, 6, 4, 1, 7
4.5
What is the difference between the high and the low values called?
Range
What type of graph represents data with spans of information? For example age ranges
Histogram
How many students are ranked 40-119?
17 students
Make a dot plot for the following set:
1, 3, 4, 5, 5, 7, 2, 5, 8
1-1
2-1
3-1
4-1
5-3
7-1
8-1
Find the mode of the following:
3, 4, 6, 7, 10, 11, 19, 15, 4, 3, 2, 4
4
What is the average of the data set called?
Mean
What graph shows points above a graph?
Dot Plot
Is this a statistical question? EXPLAIN:
How many 6th graders are at Eisenhower?
Not Statistical- because there is only one answer
If the data is symmetrical you use what measure of center and what measure of variability?
Mean and MAD
Find the range of the data set:
30, 35, 89, 53, 28, 31, 54, 88, 76
89-28= 61
What is the most repeated number in a set called?
Mode
What graph shows median, quartiles, min, and max?
Box Plot or Box and Whisker Plot
Write a statistical question for heights of students.
What are the heights of every 6th grader at EMHS
If the data is not symmetrical you use what measure of center and what measure of variability?
Median and IQR- Usually an outlier
Find the Mean of the data set:
29, 24, 53, 65, 72, 12, 14
269/7=38 and 3/7 or about 38.43
What is the middle number of data called?
Median
What is the median of this box plot?
20.5
is this a statistical question? EXPLAIN
How many hours of TV did each student watch last night?
Statistical because there are more than one responses
If the mean is 6 what is the deviation from
4 and 5?
2 and 1
3, 6, 5, 8, 8
mean: 6
MAD: 1.6
What is the difference of Quartile 3 and Quartile 1 called?
Interquartile Range or IQR
What is the IQR of this box plot
7
Is there an outlier on this box plot? If yes tell me what it is and what your measure of variability will be?
Yes- 13 Median and IQR
What is the middle 50% of typers ranges from
50 to 80