Measures of Central Tendency
What are the three measures of central tendency?
Mean, Median, Mode
Find the range of this data set: 17, 47, 26, 2, 31, 19
45
What are the five values need to make a box-and-whisker plot?
Minimum, 1st quartile, median, 3rd quartile, maximum
This Stem and Leaf plot has ______ items of data.
Ages of Parents | |
Stem | Leaf |
3 | 1 4 4 9 |
4 | 0 0 0 1 2 3 5 7 |
5 | 2 3 |
Key: 3 1 = 31 years old
What is 14?
This is the mode of the following book costs: 5, 5, 9, 49, 11, and 5
What is 5?
Find the mean rounded to the nearest tenth: 17, 26, 37, 22, 30, 19, 21
24.6
To maintain quality control in a soda factory, every 20th bottle of root beer coming off the production line was open and tested.
This is an example of ________ sampling method.
What is Systematic?
What are the minimum and maximum values of the data set: 78, 12, 109, 36, 121
12 and 121
Most student completed homework in this amount of time, according to this stem and leaf chart.
Time to Complete Homework | |
Stem | Leaf |
3 | 2 2 2 2 2 2 4 |
4 |
|
5 | |
6 | 9 |
7 | 6 8 |
8 | 4 |
Key: 3 2 = 32 minutes | |
What is 32 minutes.
Calculate this measure of central tendency by adding all the data values together and dividing the sum by the total number of data values.
What is the mean?
Find the median: 197, 56, 203, 79, 145, 2
112
The measure of variability of a numerical data set that is the difference between the greatest and least values in a data set.
What is the range?
What is the median of the data set: 72, 90, 84, 76, 68
76
Ms. Jackson's Quiz Scores
Stems | Leaves |
6 | 3 6 |
7 | 2 9 |
8 | 4 7 7 |
9 | 0 0 1 1 3 3 3 |
Key: 6|3 means 63 | |
What is 84%.
The mean of the data set of the number of books these five people own: 37, 50, 53, 17, 10, 49
What is 36.
What value of x makes this data set have a mean of 6: 10, 6, 12, 3, x
5
The range of each data set: 30, 27, 24, 30, 32, 31
What is 8?
What are the 1st and 3rd Quartiles of the data set: 19, 22, 15, 20, 12
13.5 and 21
Number of crimes committed in 1984
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Create a histogram using the following info
Teacher check for acuracy
Your classmate describes the data below by using a measure of center, 21.5. 25, 4, 78, 18, 7, 63
What is the median?
Create a data set that has 5 values, has a mean of 12, a median of 13 and a mode of 13 and 14.
6, 13, 13, 14, 14
Find the standard deviation of the data set: 63, 59, 70, 68
4.3
Find the minimum, 1st quartile, median, 3rd quartile, and maximum: 27, 22, 25, 27, 23, 28
22, 23, 26, 27, 28
Complete the two way table
| French | German | Spanish | Total |
Female | 15 | 39 | ||
Male | 17 | 41 | ||
Total | 31 | 28 | 80 |
| French | German | Spanish | Total |
Female | 15 | 11 | 13 | 39 |
Male | 16 | 17 | 8 | 41 |
Total | 31 | 28 | 21 | 80 |