Definitions
What does experimental probability mean and theoretical probability mean?
Experimental probability = the result of an experiment after a large number of tries. Theoretical probability = what is expected to happen based on possible outcomes
A number cube is labeled from 1 to 6. The cube is rolled 100 times and each outcome is recorded.
Outcome 1 2 3 4 5 6
Frequency 19 15 17 23 21 5
What is the experimental probability of rolling a 5?
21/100
What is the mean for this data set?
2, 4, 7, 3, 5, 15
6
What is the formula for experimental probability?
Experimental probability = number of times the event occurs / total number of trials
A number cube is labeled from 1 to 6. The cube is rolled 100 times and each outcome is recorded.
Outcome 1 2 3 4 5 6
Frequency 19 15 17 23 21 5
What is the experimental probability of rolling an even number?
43/100
What is the mode of this data set?
3, 5, 6, 4, 4, 4, 3, 1, 3
3 and 4
What is the formula for theoretical probability?
Theoretical probability = number of favourable outcomes / number of possible outcomes
A spinner is divided into equal sections. The sections are labeled different colours. The pointer is spun.
What is the theoretical probability of the pointer landing on red?
3 blue
5 red
3green
1 yellow
5/12
Arrange the numbers in each set from smallest to biggest.
Find the median.
13, 19, 26, 10, 43
19
The word mean is defined as the ___________, and the word mode is defined as the ______________.
Average, most frequently repeated number
A spinner is divided into equal sections. The sections are labeled 1 to 8. The pointer is spun.
What is the theoretical probability of the pointer landing on an even number?
4/8 or 1/2
Arrange the numbers in the set from smallest to biggest.
Then find the range.
13, 19, 26, 10, 43
43 - 10 = 33
The word median is defined as ________, and the word range is defined as ________________
the middle number when the data are arranged in order, tells how spread out the data are (difference between the greatest and smallest numbers)
10 marbles are in a bag.
What is the theoretical probability that the marble is green?
3 are green
4 are yellow
2 are pink
1 is blue
3/10
What is the mean, median, mode, and range of the following data set?
21, 31, 33, 33, 33, 45, 55, 92, 98
Mean: 441/9 = 49 (average)
Median: 33 (middle number)
Mode: 33 (most repeated number)
Range: 98 - 21 = 77