Mean
What is the formula to calculate Mean?
The average, or all the numbers added up then divided by the amount of numbers.
OR
Mean = Sum of all the data point / Number of data points
How to calculate the Median when there are odd number of data points
Put the data in order from least to greatest and find the middle value.
What is the mode as a measure of center?
The most repeated data point.
If the question is about your favorite fast food restaurant, Then which is the best measure of center that should be used?
Mode
What is the mode? 13,14,1,7,25,23,14,17,14,24,35,14
14
Calculate the Mean
1,2,3,4,5,6
3.5
What measure of center should be used with this data set? 3, 5, 2, 4, 3, 30
Median because of the outlier (30)
How do you find the middle of the data?
cross off from left to right and move towards center
Calculate the Mean
18, 8, 6, 5, 13
10
How to calculate the median when there are an even number of data points?
Put the data in order from least to greatest.
Find the two middle values and add them, then divide by 2.
Can a data set have no mode?
Yes
What measure of center should be used on this data set? 54, 55, 56, 57, 54, 53
Mean because the data is close together
Suppose the median of a data set is 4. If I add a 6 to the data set, what else do I need to add to keep the median at 4?
2
If one of the data point is 5, and the mean is 6. What is the other data point?
7 because 5 + 7 = 12 and 12 divided by 2 = 6
What is the Median? 2,6,15,17,18,25
16
What measure of center should be used on this data set?
To calculate the overall grade for a student who has received individual marks for 5 subjects.
Mean
If the mean of a data set is 5, what ONE point can I add to keep the mean at 5?
5
Calculate the Mean
10,14,15,17,18,24
16.333
What is the Median? 10,13,15,16,19,27,29,31
17.5
What is the Mode? 14,13,12,15,24,27,15,27,15,12,27,12,2,12,15
12 and 15
What measure of center would be used if a class was asked their favorite color of crayon?
Mode
Find the mean, median and mode
1 2 3 4 5
Mean = 2.5
Median = 3
Mode = No Mode