12.1 Populations and Samples Follow up (Table Groups)

Determine whether each sample

is a random sample or a biased

sample. Explain.

Carlos chooses 50 movies at

random from a list of all his movies

to determine the average runtime

of the movies in his collection.

• Biased; the movies were selected at

  random.

• Random; the movies were selected at

  random.

• Biased; the movies are from his collection.

• Random; the movies were chosen alphabetically.

Determine whether each sample

is a random sample or a biased

sample. Explain.

Lisa asks 75 people at a neighborhood fast food restaurant about the last meal they ate, in order to find out the eating habits of people in her neighborhood.

• Random; Lisa chose the first fast food restaurant she saw.

• Random; Lisa asked people at different restaurants.

• Biased; 75 people is not a big enough sample.

• Biased; eating habits of people at a fast

  food restaurant might not accurately

  represent the population.

Determine whether each question

may be biased. Explain. Would a theme park with expensive ticket prices be a good place for a field trip?

• Biased; the use of the word expensive in

  the question discourages people from answering yes.

• Biased; the use of the word expensive in

  the question encourages people to

  answering yes.

• Not biased; the question does not lead people to answer a certain way.

• Not biased; A field to a theme park is a good idea.

Determine whether each question

may be biased. Explain.

5. What is your favorite horror movie?

• Biased; the genre can lead people to certain responses.

• Biased; the word favorite in the question discourages people from responding in a certain way.

• Not biased; the question is appropriate for 7th graders.

• Not biased; the question does not suggest a certain answer.