A multinational firm manufactures several types of 1280 × 1024 LCD displays in several locations.They designed a sampling experiment to analyze the number of pixels per screen that have significant color degradation after 52,560 hours (six years of continuous use) using accelerated life testing.The Excel ANOVA table for their experiment is shown below.Some table entries have been obscured.The response variable (Y) is the number of degraded pixels in a given display. 
How many display types were there?
Definitions:
Judaism
A monotheistic religion of the Jewish people, encompassing their culture, philosophy, traditions, and rituals guided by the Hebrew Bible.
Protestant Ethic
A concept in sociology that relates hard work, frugality, and prosperity to a person's salvation and ethical life, particularly within Protestantism.
John Calvin
A theologian and key figure in the Protestant Reformation, known for his influential teachings and writings on Christianity.
Worldly Activity
Actions or endeavors undertaken by individuals or groups that are concerned with the secular, earthly, or material aspects of life.
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