Transcript DO NOW - Your School

DO NOW
Outcome
Probability
Red
Blue
White
Yellow
Experimental Probability
7.SP.6
Experimental Probability
• the ratio of the number of times an event occurs
to the total number of trials, or times the activity
is performed
Experimental Probability
• Calculated AFTER an experiment
• Based off what ACTUALLY HAPPENED
• Example
▫ After 1000 spins of the spinner, the following data
was recorded. Estimate the probability of spinning a
red.
Outcome
Blue
Red
Green
Spins
448
267
285
P = # of red = 267 = 0.267 or 26.7%
total spins 1000
Interactive Experimental Probability
• http://www.shodor.org/interactivate/activities/
ExpProbability/
Guided practice
• A game spinner was spun 500 times. A was spun
170 times, B was spun 244 times, and C was
spun 86 times. Estimate the probability of the
spinner landing on A.
• A coin was randomly drawn from a bag and then
replaced. After 200 draws, it was found that 22
pennies, 53 nickels, 87 dimes, and 38 quarters
had been drawn. Estimate the probability of
drawing a penny.
Assignment
• P. 453 #4-11