0.1-0.5 Quiz review

What is a hypothesis?

• A conclusion drawn from data

• A prediction that can be tested

• An observation made during an experiment

• A question asked during research

What is the manipulated variable in a hypothesis often referred to as?

• The responding variable

• The controlled variable

• The independent variable

• The dependent variable

What should you never say about a hypothesis?

• "The data supports my hypothesis"

• "The hypothesis is correct"

• "The data refutes my hypothesis"

What does the null hypothesis state about the difference between two groups of data?

• There is a significant difference

• There is no difference

• The difference is due to experimental error

• The difference is due to bias

What is the null hypothesis (H₀) for the effect of age on a person's ability to do memorize names?

• Age has no effect on a person's ability to memorize names.

• Adults will be better at memorizing names.

• Teenagers will be better at memorizing names.

• Age will improve a person's ability to memorize names.

If the alternative hypothesis that soda consumption increases heart rate is supported, what data would you expect to see?

• Heart rates decrease after soda consumption.

• Heart rates remain the same after soda consumption.

• Heart rates increase after soda consumption.

• Heart rates fluctuate randomly after soda consumption.

What is the null hypothesis (H₀) for the effect of hyaluronic acid (HA) on skin?

• Hyaluronic acid will decrease symptoms of dryness and dehydration.

• Hyaluronic acid has no effect on skin.

• Hyaluronic acid will increase symptoms of dryness and dehydration.

• Hyaluronic acid will cause skin irritation.

What is the purpose of the control group in an experimental design?

• To receive the experimental treatment

• To help in statistical analysis and increase confidence in the results

• To measure the dependent variable

What is the role of the positive control group in an experiment?

• To receive no treatment

• To ensure the experimental setup can produce a known effect

• To measure the independent variable

• To introduce variability in the results

What is the independent variable in an experiment?

• The factor that is measured and affected by the experiment

• The factor that is kept constant for all groups

• The factor that is changed between groups

• The outcome of the experiment