2.1 Ag Associate Certification Quizs

What is the difference between a theory and a law in scientific research?

• A law is a guess, a theory is proven

• A theory explains why, a law describes what happens

• A theory is always correct, a law is not

• A law is a hypothesis, a theory is a fact

Median

• To determine the central tendency of a data set.
• To measure the variability of a data set.
• To find the maximum value in a data set.
• To calculate the average of a data set.

Which of the following is NOT a step in the engineering design process?

• Define the problem

• Form a hypothesis

• Prototype models

• Improve and refine

Mean

• Mean is the average of a set of numbers.
• Mean is the total of a set of numbers.
• Mean is the middle value in a set of numbers.
• Mean is the difference between the highest and lowest values.

What are prototype models within the engineering design process?

• Prototype models are detailed technical specifications for manufacturing.
• Prototype models are theoretical concepts that do not require testing.
• Prototype models are preliminary versions of products used to test and refine designs in the engineering design process.
• Prototype models are final products ready for market release.

What is the dependent variable?

• The dependent variable is the variable that is measured in an experiment.
• The dependent variable is the variable that is manipulated by the researcher.
• The dependent variable is the variable that remains constant throughout the experiment.
• The dependent variable is the variable that is controlled in an experiment.

What is the purpose of drawing conclusions in the scientific method?

• To gather background data

• To test the prediction

• To interpret results and relate them to the hypothesis

• To present data

What is the purpose of a line graph?

• To illustrate the relationship between two variables at a single point in time.
• To display categorical data in separate bars.
• To represent data in a pie chart format.
• The purpose of a line graph is to show trends or changes over time.

Which of the following is the first step in the scientific method?

• Form a hypothesis

• Make an observation

• Draw conclusions

• Test the prediction

What does measures of dispersion mean?

• Measures of dispersion are only concerned with the average of a dataset.
• Measures of dispersion refer to statistics that describe the extent to which data points in a dataset vary or spread out.
• Measures of dispersion indicate the central tendency of data points.
• Measures of dispersion are irrelevant in statistical analysis.