Using Samples to Predict
BIASED or UNBIASED? Explain your choice.
Asking people at a horror film about their favorite movie genre (category).
What is biased, because people at a horror film probably like horror movies.
A bake shop surveyed a group of their customers to determine their favorite type of pie.
Apple 35
Pumpkin 15
Pecan 8
Cherry 28
Raspberry 25
Blueberry 14
What percent reported pecan or blueberry pie as their favorite?
What is 18.4%
INDEPENDENT or DEPENDENT.
Choosing a blue M&M from a bag, eating it, then choosing another blue M&M.
What is DEPENDENT?
BIASED or UNBIASED. Explain your choice.
Asking 7th graders about their favorite flavor of ice cream by choosing names from a box containing the names of all of 7th grade students.
What is unbiased, because every 7th grade student has an equal chance of being selected.
In the popular TV series iCarly and Victorious, instead of Apple phones they use ______ phones.
What is Pear.
If the probability that it will snow on Monday is 2/7 and the probability that it will snow on Tuesday is 6/10, find the probability that it does not snow either day.
What is 12/70
BIASED or UNBIASED. Explain your choice.
A company is interested in opening a gym on its premises for all employees. They ask all 3rd shift workers (11 pm – 7 am) if they would use the gym, and what hours they would like the gym to be open.
What is Biased, not all workers have a chance to give their input.
A bake shop surveyed a group of their customers to determine their favorite type of pie.
Apple 35
Pumpkin 15
Pecan 8
Cherry 28
Raspberry 25
Blueberry 14
Out of 400 people, how many would you expect to say their favorite pie is raspberry or pumpkin?
What is 128
In a bag of money, there are 8 $1 bills, 6 $5 bills, 4 $10 bills, and 2 $20 bills. Find the probability of the following outcome in a fraction.
P($1 bill, then $10 bill) = __________
What is 32/400
To determine how many houses in his neighborhood plan to hand out candy on Halloween, Mason chooses one street at random and surveys each household on that street
What is Biased, Jacks only surveys one street in his neighbor hood.
Summerset Middle School wants to change their school mascot. They came up with five mascot names and surveyed a group of random students to determine their favorite.
Patriots 5
Tigers 12
Eagles 9
Kodiaks 14
Colts 20
What percent favor the Eagles or the Tigers as their new mascot?
What is 35%
A piggy bank contains 5 quarters, 12 dimes, 3 nickels, and 5 pennies. A coin is chosen at random, not replaced, then another is chosen.
P(Both Dimes)
What is 132/600
Suppose you would like to determine how many students have a a pet at your school.
Give an example of a biased sample and an unbiased sample.
What is... teacher determine.
Summerset Middle School wants to change their school mascot. They came up with five mascot names and surveyed a group of random students to determine their favorite.
Patriots 5
Tigers 12
Eagles 9
Kodiaks 14
Colts 20
If there are 1,200 students in the school, how many would you expect to choose the Kodiaks as their favorite mascot?
What is 280.
A piggy bank contains 5 quarters, 12 dimes, 3 nickels, and 5 pennies. A coin is chosen at random, not replaced, then another is chosen.
P(Dime, then Quarter)
60/600