Show:
Sample Space
Probability
More Probability
Theoretical
and
Estimated
Probability
100
Bag contains 4 yellow chips, 6 brown chips, 7 pink chips, and 3 white chips. What is the sample space of this experiment?
yellow, brown, pink and white
100
Jennifer finds the probability of 7th graders owning a pet to be as follows: dog=.6 Cat=.4 Fish=.1. What is wrong with assigned probabilities?
probabilities = 1.1, probability can not be more than 1
100
A cable company wants to know the probability that you watch reality TV shows. A survey from Atlantic City shows that 650 out of 1000 people watched reality TV shows. Assuming that the probability of watching a reality TV shows is similar between your city and Atlantic City, what is the probability that a randomly selected person from your city watches reality TV shows?
650 / 1000 or .65
100
If all of the squares on the board have any equal chance of being selected. What is the probability that number 15 will be selected?
1/20 or .05
200
A cable TV company wants to see which of its three plans is most popular with its customers. The three plans that are offered are Basic, Digital Preferred, and Digital Plus. If the cable company randomly sample 1000 customers, what is the sample space of the experiment?
Basic, Digital preferred and Digital Plus.
200
Jennifer finds the probability of 7th graders owning a pet to be as follows: dog=-.6 Cat=.3 Fish= .2. What is wrong with assigned probabilities?
Probability can never be a negative number
200
The probability of male owning a dog is .45. Does this mean that the probability of a female owning a dog is .55? Explain your answer
No .55 is the probability that a male doesn't own a dog. The probability of a female owning a dog would be something different
200
If you are equally likely to pick any number in the square, what is the probability that you will pick a number in the lower left hand corner of the square, 10,12,2,1?
4/20 or .20
300
Jennifer wants to know which pet is most popular amongst 7th grades dogs, cats, or fish. She randomly samples 100 7th graders. What is the sample space of the experiment?
dog, cat, fish
300
A class of 20 students was asked how many pets they have. The results are as follows: 0 pets = 4 students / 1 pets = 6 students / 2 pets = 7 students / 3 pets = 3 students. What is probability that a randomly selected student has only two pets?
7/20 or .35 or 35%
300
If the probability of owning a dog is .45 and the probability of male owning a dog is .65, which is more likely to happen and why?
A male owning a dog is more likely to happen because the probability is higher
300
On the board is a chart displaying 100 selection from the square. Does the player have a tendency to select the numbers in the lower left of the square more then we would expect if every square has an equal chance of being picked?
20 /100 or .2 no this is exactly what we would expect
400
A cable TV company wants to see which of its three plans is most popular with its customers and how many hours of TV they watch. The three plans that are offered are Basic, Digital Preferred, and Digital Plus. The company also wants to know it they watch 3 or more hours of TV a day. If the cable company randomly sample 1000 customers, what is the sample space of the experiment?
Basic, Less than 3 Basic, 3 or more / Digital preferred, Less than 3 Digital Preferred, 3 or more / Digital Plus Less than 3, Digital Plus 3 or more
400
A class of 20 students was asked how many pets they have. The results are as follows: 0 pets = 4 students / 1 pets = 6 students / 2 pets = 7 students / 3 pets = 3 students. What is probability that a randomly selected student has at least 2 pets?
7 + 3= 10 10/20
400
You want to determine the probability of a family with two children having exactly two boy. If the probability of having a boy or a girl is equally likely, what is the theoretical probability of having exactly two boy?
1/4 = .25
400
A new DVD is on sale for 1/5 off the original price. If the original price is $49 what is the sale price?
49(4/5) = $39.20
500
Jennifer want to know which pet is more popular amongst 7th grades dogs, cats, or fish and if you have 2 or more pets. She randomly samples 100 7th graders. What is the sample space of the experiment?
dog less than 2 pets, dog 2 or more pets / cat less than 2 pets , cat 2 or more pets / fish less than 2 pets, Fish 2 or more pets
500
A class of 20 students was asked how many pets they have. The results are as follows: 0 pets = 4 students / 1 pets = 6 students / 2 pets = 7 students / 3 pets = 3 students. What is probability that a randomly selected student does not have exactly 1 pet?
1 - 6/20 = 14/20
500
You ask 100 families with two children if they have exactly 2 boys. Of the 100 family 45 say yes they have two boy. Would this cause you to question the theoretical probability from the previous question?
yes, since .45 is much larger the .25, I would question whether or not there is really an equal chance of getting each outcome.
500
If a 80in flat screen tv is on sale for $950 and you receive a discount of 1/3 off the original price. How much money did you save by buying the TV on sale?
950/ 2/3 = 1425 1425-950= $475