# Obtaining, analysing and evaluating results test questions - WJEC

### 1

In an experiment, A was changed and B was measured. What is the relationship between A and B?

### 2

In an experiment, A was changed and B was measured. The students did not measure any data when A was set to 2. Based on the numbers in the table, what is the likely missing value when A is 2?

### 3

In an experiment, A was changed and B was measured. What is the relationship between A and B?

### 4

In an experiment to measure the speed of sound over a long field, a student records four time intervals between seeing a stick being hit and receiving the sound. One reading is anomalous. The student needs to calculate the mean of the data in the most accurate way. How should they go about this?

0.73, 0.69, 0.42, 0.71

### 5

Five groups of students have been measuring the time taken for a rubber bung to be spun round ten times when there is a weight on the other end.

They made the following table of results.

Which group has made a mistake in their measuring?

### 6

Repeatable results...

### 7

What is the relationship between the variables A and B?

### 8

Which of these would not improve accuracy?

### 9

In an experiment to measure the stopping distance of a car at different speeds, what is the independent variable?

### 10

Removing any anomalies, what is the mean time for 10 rotations when a force of 2 N is tested?