Unit 3 L3 Btec Applied science NQF

Definition of a hypothesis

• A prediction, based on scientific ideas, made as a starting point for further investigation

• A prediction which states that there is no relationship between two variables or no difference among groups.

• A scientific question that requires an answer

• A scientific observation

Definition of a null hypothesis

• A prediction which states that there is no relationship between two variables or no difference among groups.

• A prediction, based on scientific ideas, made as a starting point for further investigation

• A scientific observation

• A scientific question that requires an answer

What is an independent variable?

• The variable that may change as result of the changing independent variable. This is the variable you measure.

• Variables that need to be kept constant

• The variable being changed in an investigation.

• The method to be followed

What is a dependent variable

• A method to be followed

• The variable being changed in an investigation.

• Variables that need to be kept constant.

• The variable that may change as result of the changing independent variable. This is the variable you measure.

What is a control variable?

• The method being followed

• Variables that need to be kept constant.

• The variable that may change as result of the changing independent variable. This is the variable you measure.

• The variable being changed in an investigation.

What does quantitative mean?

• Observations made without using numbers.

• Data which involves using numbers.

• Recordings made of colour

• Recordings made of physical changes

What does qualitative mean?

• Measurements involving mass

• Measurements involving volume

• Data which involves using numbers.

• Observations made without using numbers.

In science what does accuracy mean in terms of data?

• When results are repeated

• How precisely the measurement is taken.

• How close the readings are to the actual values.

• When results are valid

What is this formula showing?

• T-Test

• Standard deviation

• Mean

• Chi squared test

What does the formula show?

• Standard deviation

• t-test

• chi squared

• mean