Back to notes
What are the steps to find the median in a data set with an odd number of members?
Press to flip
1. Arrange the data set in order. 2. Identify the middle value.
How do you calculate the mean of a data set?
Add up all the numbers in the data set and divide by the number of items in the set.
Give an example of a data set with no mode.
{1, 2, 3, 4} (no value repeats)
Explain the median of a data set.
The median is the middle value that splits the data set into two equal halves when arranged in order.
How do you find the mode of a data set?
Identify the most frequent value in the data set.
What is the mean of the data set {1, 2, 3, 4, 4}?
(1 + 2 + 3 + 4 + 4) / 5 = 14 / 5 = 2.8
What is the mean number of guitars sold per month if 108 guitars were sold over 12 months?
9
What is the median of the data set {3, 1, 4, 2, 5}?
3
What is the mode of the data set {5, 3, 5, 2, 5}?
5
If the ages of six family members sum to 222, what is their mean age?
37
If a data set has an even number of values, how is the median calculated?
Find the middle two values, add them together, and divide by 2.
What is the general purpose of calculating the mean, median, and mode of a data set?
To understand and interpret properties of data sets.
In the data set {7, 7, 15, 15}, what are the modes?
Modes are 7 and 15.
Compare the mean and median for the data set {1, 2, 3, 8, 6}.
Mean = 4, Median = 3
Can a data set have more than one mode?
Yes, a data set can be bimodal or multimodal if multiple values occur with the same highest frequency.
Previous
Next