Content Area: Math

 

Index: 4.4B Grade 8 CPI 5

 

Standard: 4.4 - Data Analysis, Probability, and Discrete Mathematics

 

Strand: B - Probability

 

Cumulative Progress Indicator: 5 - The student will estimate probabilities and make predictions based on experimental and theoretical probabilities.

 

Grade: 8

 

Sample Activities:

 

·        Students are presented with data collected by an ecologist tallying the number of deer of one species that died at ages from 1 to 8 years. Students use the data to discuss the probability of living to various given ages and what they would expect the life expectancy of this species to be.

 

Sample Assessment Question:

 

·        Weatherpersons predict tomorrow's weather based on what has happened in the past on the days following days just like today. During the past 50 years, there have been 380 days that have been just like today, and of those, 200 have been followed by a clear day. Which of the following is the approximate probability of a clear day tomorrow that would be given by a weatherperson using the prediction rule described in this problem? 

o       a) 13%

o       b) 34%

o       c) 53%

o       d) 66%

 

The correct answer is C.