CRC Research Methodology and Experimental Design

Question 1

Which type of experimental design is most appropriate when a research chef wants to test the effect of three different hydrocolloids on gel strength while controlling for temperature and pH?

Accepted Answer

Factorial Design

Answer

Completely Randomized Design (CRD)

Answer

Randomized Complete Block Design (RCBD)

Answer

Latin Square Design

Question 2

In product development research, what is the primary purpose of a control sample?

Accepted Answer

To provide a baseline against which experimental samples are compared

Answer

To act as the most expensive formulation for cost comparison

Answer

To represent the competitor's product in blind testing

Answer

To serve as the final prototype submitted for commercialization

Question 3

A research chef runs the same bench-top experiment five times under identical conditions to obtain five yield measurements. This practice improves which aspect of the study?

Accepted Answer

Reliability (repeatability)

Answer

Internal validity

Answer

External validity

Answer

Construct validity

Question 4

Which statistical test is most commonly used to compare the means of three or more independent formulation groups in food product development?

Accepted Answer

One-way ANOVA

Answer

Paired t-test

Answer

Chi-square test

Answer

Pearson correlation

Question 5

What does a p-value of 0.03 indicate in a food science experiment using a significance level of α = 0.05?

Accepted Answer

The result is statistically significant and the null hypothesis is rejected

Answer

There is a 3% probability the null hypothesis is true, so it is rejected

Answer

The result is not statistically significant and the null hypothesis is retained

Answer

There is a 97% chance the experimental variable had no effect

Question 6

In a bench-to-pilot plant scale-up study, a research chef uses the same ingredient percentages but observes different texture outcomes. This discrepancy most likely reflects a failure in which research concept?

Accepted Answer

Scalability and process equivalence

Answer

Randomization

Answer

Replication

Answer

Blinding

Question 7

Which document formally outlines the objectives, scope, methodology, and success criteria for a food product development project before experimentation begins?

Accepted Answer

Research protocol or project brief

Answer

Product specification sheet

Answer

Bench record notebook

Answer

HACCP plan