Dr. Upadhyaya has carried out two way ANOVA with 'intensity of light' and 'font size' as independent variables and 'visual acuity' as the dependent variable. Which of the following are true?
A. Interaction effect can be checked
B. It is a factorial design
C. Independent variables have been taken up as continuous variables in this study
D. This is a suitable example to establish causal effect
Choose the most appropriate answer from the options given below:

Correct option is D

• B is TRUE: Two-way ANOVA involves a factorial design where two independent variables are studied simultaneously
• D is TRUE: ANOVA is an experimental design that can establish causal relationships when properly controlled
• A is TRUE: Two-way ANOVA specifically allows for testing interaction effects between the two independent variables

Information Booster:
• Two-way ANOVA examines main effects of each independent variable and their interaction
• Factorial designs allow researchers to study multiple variables efficiently in one experiment
• Interaction effects show how the combination of variables affects the outcome differently than individual effects
• ANOVA requires random assignment and controlled conditions to establish causality
• The design can detect whether light intensity and font size work together to influence visual acuity
• Statistical significance testing helps determine if observed effects are meaningful or due to chance