Understanding Random Sampling and Data Inference

What is the purpose of placing notes in the red notebook?

• To differentiate subjects

• To follow the teacher's instructions

• To ensure notes are easily accessible

• To organize data for analysis

Why is it important to understand random sampling?

• To make better predictions about population preferences

• To avoid learning about statistics

• To only focus on friends' opinions

• To guess the outcome without data

What makes a sample random?

• Selecting every 20th student

• Choosing participants who volunteer

• Picking names from a hat without looking

• Surveying only friends

What is biased sampling?

• Surveying every 10th person

• Asking opinions from a diverse group

• Choosing samples at random

• Selecting participants based on convenience

What does a representative sample mean?

• It includes only a specific group's preference

• It includes only the majority's preference

• It reflects the entire population's characteristics

• It is based on the teacher's choice

Why is surveying all friends not considered random sampling?

• It selects every fifth person

• It uses a random number generator

• It is based on personal relationships

• It covers the entire population

If 10 students are randomly selected, how many would you expect to prefer action movies?

• About 3 students

• More than 5 students

• Less than 2 students

• Exactly 10 students

How is the expected number of students who prefer comedy calculated?

• By adding the number of students who chose comedy and dividing by total students

• By guessing based on class size

• By surveying every single student

• By asking teachers for estimates

What percentage of students preferred romance movies?

• 50%

• 42.6%

• 32%

• 25.3%

How many students would you expect to prefer comedy if 20 are randomly selected?

• More than 12 students

• Less than 4 students

• Exactly 20 students

• About 9 students