A two-factor analysis of variance is conducted to test the effect the price and advertising have on sales of a particular brand of bottled water. Each week a combination of particular levels of price and advertising are used and the sales level is recorded. The computer results are shown below. 
How many replications were used in this study?
Definitions:
XXY Sex Chromosomal
A chromosomal configuration associated with Klinefelter syndrome, where a male has an additional X chromosome, leading to physical, developmental, and reproductive variations.
Double Helix
Describes the structure of DNA, consisting of two strands that wind around each other like a twisted ladder.
Heterozygous
A genetic condition where an individual has two different alleles of a gene, one from each parent.
Differing Alleles
Describes the variation in alleles (versions of a gene) among individuals, which can result in differences in physical appearance, susceptibility to diseases, and other traits.
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