# Sampling

In this lesson we will discuss the difference between a sample and a census, and how to avoid bias in sampling

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

## Question 4

Q1.Which of these is the correct definition of a hypothesis?

1/4

Q2.Which of these is a valid hypothesis?

2/4

Q3.Which of these is NOT an example of a primary data source?

3/4

Q4.Which of these is a potential disadvantage of collecting primary data?

4/4

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

## Question 4

Q1.Which of these is the correct definition of a hypothesis?

1/4

Q2.Which of these is a valid hypothesis?

2/4

Q3.Which of these is NOT an example of a primary data source?

3/4

Q4.Which of these is a potential disadvantage of collecting primary data?

4/4

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# Statistics Lesson 3:

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

## Question 3

Q1.In order to test what Arsenal fans think about their manager, a student gives an online questionnaire to 100 Arsenal fans. The student is testing his hypothesis by taking a ….

1/3

Q2.Which of the following is a potential disadvantage of a sample?

2/3

Q3.Mr Millar wants to test whether people prefer reading books to watching TV by asking 300 people outside Waterstones (a book shop chain) on a Friday morning. What is the most likely reason that this sample will be biased?

3/3

Quiz:

# Statistics Lesson 3:

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

## Question 3

Q1.In order to test what Arsenal fans think about their manager, a student gives an online questionnaire to 100 Arsenal fans. The student is testing his hypothesis by taking a ….

1/3

Q2.Which of the following is a potential disadvantage of a sample?

2/3

Q3.Mr Millar wants to test whether people prefer reading books to watching TV by asking 300 people outside Waterstones (a book shop chain) on a Friday morning. What is the most likely reason that this sample will be biased?

3/3

# Lesson summary: Sampling

### Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Jog

On the spot:
Dance

### Take part in The Big Ask.

The Children's Commissioner for England wants to know what matters to young people.