Center of a data set: mean, median, mode
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Intros
Examples
Lessons
- Determine the mean of each set of data:
a) {8, 5, 2, 12, 3}
b) {7, 5, 3, 8, 3, 4}
- Determine the median of each set of data:
a) {8, 5, 2, 12, 3}
b) {7, 5, 3, 8, 3, 4}
- Investigating the Impact of Outliers on the Mean and Median
The heights (in cm) of students in a class are: {156, 152, 148, 159, 150}
a) Determine the mean and the median.
b) A new student with a height of 255 cm joins the class. How does the new data value (outlier)affect the mean and the median?
- Determine the mode of each set of data:
a) {8, 5, 2, 12, 5}
b) {6, 6, 6, 7, 7, 8, 8, 8, 9}
c) {1, 2, 3, 4}
- Determining the Mean of a Frequency Distribution
Determine the mean for the population of scores in the following frequency table.
score
frequency
4
6
5
3
7
8
9
2
- Determining the Weighted Mean
Sarah has earned the following averages in her statistics course: homework-98, quizzes-92, tests-84. The overall course grade is comprised of: homework (10%), quizzes (20%), unit tests (40%), and final exam (30%).
a) What is Sarah's grade going into the final exam?
b) What score must Sarah earn on the final exam in order to earn a final grade of 90% for the course?