Survey Methods and Sample Representation

The video tutorial covers the concept of populations and samples in statistics, using examples like tomato plants to illustrate how samples can represent a population. It discusses the importance of random sampling over biased sampling and how survey questions can introduce bias. An experiment on shoe sizes is used to further explain these concepts, emphasizing the need for representative samples in data collection.

What is the main difference between a population and a sample?

• A population is a subset of a sample.

• A sample is a subset of a population.

• A sample includes the entire population.

• A population is always larger than a sample.

In the tomato plant example, which sample was more representative of the entire population?

• The twelve plants in the first two rows.

• The twelve randomly selected plants.

• The six randomly selected plants.

• The six plants in the first row.

Why is a larger sample size generally more representative of a population?

• It covers more diverse parts of the population.

• It is easier to analyze.

• It is less time-consuming.

• It always includes the entire population.

Why was Roberto's survey at the baseball game considered biased?

• He surveyed too many people.

• He only asked people who like baseball.

• He did not ask enough people.

• He asked people from different towns.

What makes Paula's method of drawing names from a hat random?

• She only asked her friends.

• She selected names based on their grades.

• She asked students sitting in the front row.

• She drew names without any preference.

Which of the following questions is biased?

• Do you prefer cats as pets?

• Do you like animals?

• What is your favorite season?

• What is your favorite pet?

How can the wording of a survey question introduce bias?

• By asking too many questions.

• By using neutral language.

• By being too short.

• By including an opinion or leading information.

In the shoe size survey, why was the first method considered biased?

• It included only boys.

• It included only girls.

• It included all students.

• It was conducted online.

What makes the second method of the shoe size survey more representative?

• It included only girls.

• It included all students.

• It was conducted in person.

• It included only boys.

Why is it important to have a representative sample in a survey?

• To make the survey more interesting.

• To reduce the number of questions.

• To accurately reflect the entire population.

• To ensure the survey is quick.