The rationale for your experiment should be _____________.

• specific

• interesting

• effective

• considered

The research question should be _____________ and relevant.

• interesting

• specific

• considered

• conclusive

The variable that you change is called the __________________.

• Independent variable

• Dependent variable

• Controlled variable

• Extraneous variable

The dependent variable is _________________.

• unchanged

• the data that you collect

• linear

• the variable that increases the most

Which of the following best increases the reliability of your data?

• The use of accurate equipment

• Elimination of outliers

• Conducting experiment carefully

• Increase replicates

Which of the following will reduce the validity of data?

• Extraneous variables

• Too many experimental groups

• Low number of replicates

• Absence of statistical tests

A variable that was not accounted for when the experiment was designed is known as ______________________.

• an extraneous variable

• a controlled variable

• an independent variable

• a dependent variable

A Student's t-test will generate a ______________.

• t-value

• k-value

• R-value

• p-value

A Student's t-test will determine ____________________.

• if the data is statistically significant

• if there is a difference between two groups

• if there is a standard error

• the validity of the data

A p-value smaller than 0.05 (p<0.05) shows that there is _______________.

• no statistically significant difference between two groups.

• a statistically significant difference between two groups.

• a significance in the data.

• valid and reliable data.