- Home
- Provincial Achievement Test
- Statistics
Probability
- Intro Lesson: a9:56
- Intro Lesson: b10:03
- Intro Lesson: c5:07
- Intro Lesson: d3:53
- Lesson: 13:02
- Lesson: 2a2:00
- Lesson: 2b1:20
- Lesson: 2c1:10
- Lesson: 2d2:14
Probability
This lesson answers the question: What are the differences between mean, median and mode in statistics? Also, we will learn how to calculate the probabilities out of a two-way frequency table, and figure out the trends.
Lessons
- Introductiona)Introduction to Probability
- What is probability?
- How to write probability as a fraction, decimal, and percent?
- How to draw a tree diagram?
b)Introduction to statistics:
• What is mean?
• What is median?
• What is an outlier?
• What is mode?
• What is range?
c)What is a two-way frequency table?d)How to read a two-way frequency table? - 1.The following is the money raised in a school fund raising activity by each class in grade 9: $1 000, $580, $810, $1 050, $840 and $600. What is the mean, median and mode amount of money raised by these six classes?
- 2.Six hundred people were randomly selected in downtown. They were asked if they choose their clothes based on its comfort or style. The following is the results:
Comfort
Style
Total
Male
172
133
305
Female
115
180
295
Both
287
313
600
a)What is the probability that a person in the survey is a female?b)What is the probability that a person chooses comfort over style?c)What is the probability that a male chooses style over comfort?d)Was there any assumption made in this survey?