Biased Samples
Which statement describes a biased sample? A) It is very small B) It is not randomly chosen C)It results in incorrect predictions D) It does not accurately represent the population E) All of the above.
E. All of the above.
Which of these questions is a biased question? A) What is your favorite color? B) Do prefer action movies or a comedy. C) Do you like is high tech computer or this out dated computer. D) Should the town build a skate park or a swimming pool?
C. It tries to convince you to pick the high tech computer.
A company did a random sample of computer chips. It found 2 out of 50 were defective. If the company made 500 computer chips, how many might be defective?
20 computer chips
Biased or unbiased? In a survey about a new bike path, a random sample of dog walkers are ask.
Biased, because not everyone walks dogs.
Is the question biased? What is your favorite book?
No.
A baker produces 1000 loaves of bread a day. A sample of 20 shows 3 do not meet quality control. Predict how many loaves do not meet quality control each day.
150 loaves of bread
Is this sample biased? A principal wants to find out if her school needs more bike racks. A survey is taken of 30 students who ride the bus.
Yes it is biased, because not everyone takes the bus.
Is this a biased question? Is green your favorite color?
Biased, because it leads you to pick green.
Target buys 15,000 ipads each month. A random sample of 100 ipads shows 4 are defective. Predict how many ipads might be defective each month.
600 ipads
Biased or Unbiased? The city wants to know if the town wants a new movie theater. The city asks random people at the bowling alley.
Biased.
Biased or unbiased? Should the town waste money on a new city hall?
Biased
A random sample of 30 students show that 5 students take the city bus home. How many students might take the city bus home out of 480 students.
80 students