5.3 Collecting Data

Why is randomization important in experimental studies?

• To ensure all groups receive the same treatment

• To prevent biases in group selection

• To replicate the results accurately

• To control all variables in the experiment

What is the main focus of experimental studies?

• To observe natural occurrences

• To control and manipulate variables

• To replicate observational studies

• To randomize all aspects of the study

In Case 1, what is the treatment group?

• Those who did not get medication

• Those who did get medication

• Those who received a placebo

• Those who were not asked about their pain

In Case 1, what is the control group?

• Those who did not get medication

• Those who did get medication

• Those who received a placebo

• Those who were not asked about their pain

Why might groups of plants be used rather than a single plant for each pH level?

• To save space

• To increase reliability and reduce variability

• To reduce costs

• To simplify data collection

What is a key characteristic of an experimental study?

• Lack of control

• Randomization and control

• Observational data collection

• Use of surveys

What is a problem with overlapping age ranges in a survey?

• It makes the survey more interesting.

• It can confuse respondents.

• It reduces the number of questions.

• It increases the survey's length.

What is an issue with having a limited number of options in survey questions?

• It makes the survey more interesting.

• It can limit the accuracy of responses.

• It reduces the number of questions.

• It increases the survey's length.

What is demographic information?

• Information about survey questions.

• Information about personal preferences.

• Information about age, gender, and other characteristics.

• Information about survey length.

Why is demographic information important in surveys?

• It helps reduce the number of questions.

• It reveals trends within the population.

• It makes the survey more expensive.

• It increases the survey's length.