Question

several ikea employees have proposed different methods for assembling a bookshelf. the table below shows sample data for the time (in minutes) required by each method. based on this information, use anova to test whether there are significant differences in assembly time among the methods. how many treatments are there?

sample number	green	jones	smith	williams
2	38.4	41.7	36.8	53.4
3	39.3	43.6	37.6	52.7

a 3
b 4
c 12
d 0

Explanation:

Step1: Identify treatments in ANOVA

In ANOVA, treatments are different groups being compared. Here, each employee (Green, Jones, Smith, Williams) represents a different method of assembling the bookshelf, which are the different treatments.

Step2: Count the number of treatments

There are 4 employees, so 4 treatments.

Answer:

B. 4