Biased Stats

What can be used to show a cause-and-effect relationship between two variables?

• A controlled experiment

• A census

• An observational study

• A cross-sectional study

• A sample survey

Tags

CCSS.HSS.IC.B.3

3.  A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

7. A public library asked every 10th person who entered to name the type of book they were getting

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

1.  Carlos wants to know the favorite sport of people at his school so he asks his baseball team.

• Biased
• Unbiased

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?

• thirty students who are often tardy
• thirty students who are rarely tardy
• thirty of her friends
• thirty randomly selected students from her school

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

You are doing a survey to find out what kids really think about school lunch and you stand outside a lunchroom and ask every 5th person from every grade.

• Biased (Unfair)

• Unbiased (Fair)

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

You want to know your town’s favorite fast-food restaurant. You randomly ask 30 people their preference as they leave a McDonald’s restaurant.

• Biased (Unfair)

• Unbiased (Fair)

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

Which of the following survey questions is biased?

• Do you prefer daytime or evening television programming?

• Do you prefer to bring a healthy lunch to school or do you eat cafeteria food?

• Do you think David Miller is a good mayor?

• How many siblings do you have?

Tags

CCSS.RL.11-12.6

Select the best way to generate a list of the top three food items sold in your school cafeteria.

• Gather data about the number of sales of each food item from the cash register records.

• Ask each person who eats in the school cafeteria to tell you the individual's choice for the top food item.

• Interview all the teachers about what they consider to be the top food item.

• Ask 10% of the students in each grade to tell you their choice for the top food item.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

A Characteristic of a good survey is:

• To choose specific members of a population.

• To let each person respond as often as they wish.

• To aim for a good representation of the population.

• To include anyone who volunteers to be part of the sample.

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1