Samples, Population, Bias, Random Test

The data from two random samples of 200 students regarding their favorite sports are given in the table. Make inferences about the data and give the percentage of students who prefer soccer.

• 30%

• 25%

• 18%

• 32%

The data from two random samples of 200 students regarding their favorite sports are given in the table. Make inferences about the data and give the percentage of students who prefer dance.

• 34%

• 22%

• 16%

• 28%

 Sandy wants to estimate the percentage of students at WMS who like Dr Pepper. She will survey a random sample of 40 students from the school’s population of 1,200 students. 

Which of the following would best improve the validity of her estimate? 

• increase the population

• increase the sample size

• decrease the population

• decrease the sample size

At their first dance practice, the 6th graders took a survey to see what day their parents would prefer practice to be held on. 

Which of the following populations give the best indication of what day the parents would like the practice to be held on?

• A survey given to all of the dance teachers.

• A survey given to all of the 6th grade dance students.

• A survey given to all of the parents at the dance studio.

• A survey given to all of the parents of the sixth grade students.

Tim asked all of his friends which snapchat filter he liked best.

• Random Sample

• Biased Sample

Lonni surveyed the first 25 people to visit the new online dating site.

• Random Sample

• Biased Sample

Evan mixed some identically shaped army men on the floor, then collected 8 army men from the floor.

• Random Sample

• Biased Sample

Nina conducts a survey at her church to determine the student’s favorite pre-school teacher. Which sampling method would best produce a representative sample of the population?

• Nina surveys her 8 closest friends.

• Nina surveys every 3rd person to enter the church.

• Nina surveys every 5th pre-school student to enter the building.

• Nina surveys 4 year olds.

There are 500 students in 10th grade. Larry takes a random sample to find out what holiday the students in 10th grade prefer. 

Which group of students represents the most valid sample?

• 10 of Larry’s you tube fans

• 10 students from each 10th grade homeroom.

• Every 10th student to enter the building.

• 10 students from the basketball team.

Ted asked 20 of his friends what they thought of the new Playstion 5 game.

• Random Sample

• Biased Sample