Module 10 Random Samples and Populations Practice

Determine whether each sample is a random sample or a biased sample. Roberto wants to know the favorite sport of adults in his hometown. He surveys 50 adults at a baseball game.

• Biased, because people who don't like baseball will not be represented in this sample.

• Biased, because all the population is accurately represented.

• Random, because people who don't like baseball will not be represented in this sample.

• Random, because all the population is accurately represented.

Determine whether each sample is a random sample or a biased sample. Paula wants to know the favorite type of music for students in her class. She puts the names of all students in a hat, draws 8 names, and surveys those students

• Biased, each student has an equal chance of being selected.

• Biased, not all students have an equal chance of being selected.

• Random, each student has an equal chance of being selected.

• Random, not all students have an equal chance of being selected.

Local residents were surveyed about adding stoplights at the corner of Main Street and Perry Avenue. Determine whether the survey question may be biased. Explain.

Are stoplights needed at the intersection of Main and Perry?

• Biased; the question leads people to picking a certain side.

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

• Not biased; the question leads people to picking a certain side.

• Biased; the question does not lead people to a particular answer.

Local residents were surveyed about adding stoplights at the corner of Main Street and Perry Avenue. Determine whether the survey question may be biased. Explain.

Installing a new stoplight will require detours that will decrease traffic to local businesses for up to a month. Should stoplights be installed at the corner of Main and Perry?

• Biased; the question does not lead people to give a particular answer.

• Random; the question discourages people from answering yes to the question by mentioning a decrease in business customers.

• Random; the question does not lead people to give a particular answer.

• Biased; the question discourages people from answering yes to the question by mentioning a decrease in business customers.

For a survey, a company manager assigned a number to each of the company’s 500 employees, and put the numbers in a bag. The manager chose 20 numbers and surveyed the employees with those numbers. Did the manager choose a random sample?

• Yes, every employee had an equal chance of being selected.

• No, every employee had an equal chance of being selected.

• Yes, every employee did not have an equal chance of being selected.

• No, every employee did not have an equal chance of being selected.

In Madison County, residents were surveyed about a new skateboard park. Determine whether this survey question may be biased. Explain.

Would you like to waste the taxpayers’ money to build a frivolous skateboard park?

• This question is biased. It does not include an opinion on the skate park.

• This question is biased. It discourages residents from saying yes to a new skateboard park by implying it is a waste of money.

• This question is not biased. It discourages residents from saying yes to a new skateboard park by implying it is a waste of money.

• This question is not biased. It does not include an opinion on the skate park.

In Madison County, residents were surveyed about a new skateboard park. Determine whether this survey question may be biased. Explain.

Do you favor a new skateboard park?

• This question is biased. It does not include an opinion on the skate park.

• This question is biased. It discourages residents from saying yes to a new skateboard park.

• This question is not biased. It leads people to say yes.

• This question is not biased. It does not include an opinion on the skate park.

In Madison County, residents were surveyed about a new skateboard park. Determine whether this survey question may be biased. Explain.

Studies have shown that having a safe place to go keeps kids out of trouble. Would you like to invest taxpayers’ money to build a skateboard park?

• This question is biased. It does not include an opinion on the skate park.

• This question is biased. It leads people to say yes because it mentions having a safe place for kids to go and to stay out of trouble

• This question is not biased. It leads people to say yes because it mentions having a safe place for kids to go and to stay out of trouble

• This question is not biased. It does not include an opinion on the skate park.

Determine whether this sample is a random sample or a biased sample.

Carlos chooses 50 movies at random from a list of all his movies to determine the average runtime of the movies in his collection.

• Random

• Biased

Determine whether this sample is a random sample or a biased sample.

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

• Biased