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Less simple Probability
Simple Probability
Counting Principle
Samples
Bias or Unbiased
100
Maria is flipping a coin and spinning a spinner. The spinner has 4 equal sections labeled A-D. What is the probability the coin will land on heads and the spinner will land on the letter "A"?
1/8
100
What is the probability that you roll a odd number on a dice.
3/6 or 1/2
100
You are trying to decide what to wear to school. You know you have a green pair of pants, a red pair, and a blue pair. You also have a brown shirt, a plaid shirt, and a yellow shirt. How many different outfit combinations can you make?
9
100
To find out what color Warsaw high school likes best. Mr. Rose lined up everyone in the school and asked every 12th person what their favorite color was.
What is a systematic sample
100
Mr. Rose wants to know the heights of the school so he ask his 3rd period class what their heights are.
Biased because it is a convenient sample
200
Mr. Rose flips a coin then rolls a dice. What is the probability that that he gets heads and then an odd number.
3/12 or 1/4
200
What is the probability that you roll a 7 on a six sided dice.
0 or 0/6
200
What is the number of possible outcomes for spinning one spinner with 8 equal sections and another spinner with 6 equal sections?
48 possible outcomes
200
To find out the favorite drink at Edgewood Mr. Rose set up a table, and asked people if they would like to fill out a survey.
What is a voluntary sample?
200
Mr. Rose wants to know which candy bar is everyone's favorite at Edgewood, so he puts everyone's name in a hat and draws 50 names. He then asked those people what was their favorite candy bar.
Unbiased because it is random with a large enough number.
300
What is the probability of rolling two odd numbers in a row with a standard number cube?
1/4, or 0.25, or 25%
300
The numbers 1 - 12 are put into a hat what is the probability that you draw an even number?
6/12 or 1/2
300
Amiya and Keyshawn are candidates for class president of the 7th grade. Ajaye, Chishon, and Laura are candidates for vice president. How many winning combinations are possible?
6
300
To find out which school is better Lakeview or Edgewood. Mr. Rose went out an surveyed 10 students from each school.
What is a stratified Sample
300
Mr. Rose wants to know who is going to win the NCAA tournament so he ask all the teacher at his lunch table.
Biased because it is a convenient sample.
400
There are 3 red marbles, 2 green marbles, and 1 yellow marble in a box. One marble is taken out and not replaces. A second marble is then taken out and not replaced. What is the probability both marbles that were taken out are red?
6/30 or 1/5
400
The numbers 1 - 12 are put into a hat what is the probability that you draw an even number or prime number?
10/12 or 4/5
400
A sub shop offers the following options: rye, wheat, white, and whole grain bread; American, Swiss, and provolone cheese; and turkey, ham, and chicken. How many different sandwich combinations can they make.
48
400
To find the favorite food of Edgewood. Mr. Rose just asked everyone in his first period class what was their favorite food.
What is Convenient
400
Mr. Rose would like to know what Edgewood favorite sport is so he sets up a table, and asks if people would like to fill out a survey.
Biased because it is voluntary
500
The letters of the word "Math Class" are put into a hat and randomly drawn out. What is the probability that you draw out a M and then a S if the letters are not replaced.
2/72 or 1/36
500
You roll two dice and add the dice together. What is the probability that the sum is 6.
5/36
500
A sub shop offers the following options: rye, wheat, white, and whole grain bread; American, Swiss, and provolone cheese; and turkey, ham, and chicken. How many different sandwich combinations can they make.
What is the probability of selecting a Ham sandwich on white.
500
To find out how what kind of phone each student has. Mrs. Smyth randomly drew 15 names out of a hat to ask them what kind of phone they had.
What is a simple sample
500
Mr. Rose would like to know what the favorite subject in the United States is, so he randomly ask 20 people from each State.
Unbiased because it is a strategic random sample