Mean
How do you calculate the mean?
Add all the numbers and divide by how many numbers you have in your data set.
How do you find the median?
You line up all the numbers from least to greatest then find the middle number.
Find the mode: 55,67,89,58,55,58,77,55
55
List the 5 number summary
- Minimum
-Quartile 1 (Lower Quartile)
-Quartile 2 (Median)
-Quartile 3 (Upper Quartile)
-Maximum
How do you calculate the range?
Subtract the lowest number from the highest
What is the mean for 4, 8, 11, 14, 18?
11
What do you do when there are 2 medians?
Find their mean (average) by adding the 2 up then divide by 2
What is the mode?
The number that appears the most
What are the maximum and minimum for the following values:
35,24,32,36,40,32,40,38,36,33,11,20,19,22,8
Minimum: 8
Maximum: 40
Identify the outlier(s) 7, 15, 17, 20, 25
7
What is the mean for 108, 167, 678, 421, 768, and 999?
523.5
5, 8, 7, 4, 16, 12, 13
What is the median of this data set?
What is the range of this set? [221, 350, 209, 106, 312, 406]
300
What is the value of the upper quartile (Q3) of this data set:
28 28 28 28 32 32 34 34 40 42
34
Which is higher - the median or the mode of this data? (1,2,2,2,3,4,5,6)
The median : 2.5
Which set has a greater mean? Set A [3, 9, 8, 4, 6, 120] Set B [40, 29, 36, 42, 31, 48]
Set B: mean is 37.66...
What is the median of these numbers: 134, 125, 146, 138, 122, 150
136
What is the mode of this set? [4.2, 3.5, 4.1, 3.2, 4.2, 4.6, 4.1, 4.9, 5.6, 3.8, 4.1]
4.1
Robin collected data on the number of hours she watched television on Sunday through Thursday nights for a period of 3 weeks. The data are shown in the table below.
4, 3, 3.5, 2, 2, 4.5, 5, 2.5, 3, 1.5, 4, 3, 1, 1.5, 2.5
Construct a box-plot for this data.
Minimum: 1
Q1: 2
Med: 3
Q3: 4
Maximum: 5
Draw a box and whisker plot for this data set:
{12, 15, 18, 18, 19, 21, 24, 25, 27, 28, 30}
Min=12, Q1=18, Med=21, Q3=27, Max=30
Ms. Valsalan recorded the math scores of six students below: 72, 80, 85, 93, 78, 80.
Determine the mean of the student scores, to the nearest tenth. Describe the effect of the mean if Ms. Valsalan adds 5 bonus points to each student's scores.
Mean: 81.3
Effect of the mean: scores will increase.
Sara's test scores in mathematics were 64, 80, 88, 78, 60, 92, 84, 76, 86, 78, 72, and 90. Determine the mean, the median, and the mode of Sara's test scores.
Mean: 79
Median: 79
Mode: 78
The heights, in inches, of 10 high school varsity basketball players are 78, 79, 79, 72, 75, 71, 74, 74, 83, and 71. Find the interquartile range of this data set.
Q3: 79
Q1: 72
Answer: 7
What are the steps in clearing a list on your Ti-84?
Scroll up to L1, press "clear", press "arrow down"
What was the aim on September 28th?
How Can I Represent Data?