A Large Carpet Store Wishes to Determine If the Brand

question 4

Essay

A large carpet store wishes to determine if the brand of carpet purchased is related to the purchaser's family income. As a sampling frame, they mailed a survey to people who have a store credit card. Five hundred customers returned the survey and the results follow: $$\begin{array} { | l | c | c | c | } \hline & & { \text { Brand of Carpet } } \\\hline \text { Family Income } & \text { Brand A } & \text { Brand B } & \text { Brand C } \\\hline \text { High income } & 65 & 32 & 32 \\\hline \text { Middle income } & 80 & 68 & 104 \\\hline \text { Low income } & 25 & 35 & 59 \\\hline\end{array}$$ At the 5% level of significance, can you conclude that the brand of carpet purchased is related to the purchaser's family income?

---

Definitions:

Genetic Code

The set of rules by which information encoded in genetic material (DNA or mRNA sequences) is translated into proteins by living cells.

Triplet Codes

Sequences of three nucleotides on DNA or RNA that code for specific amino acids, fundamental to the genetic code and protein synthesis.

Codon Sequences

Specific sequences of three nucleotides in mRNA that specify particular amino acids during the translation process of protein synthesis.

Codons

Sequences of three nucleotides in mRNA that specify the addition of a particular amino acid into a polypeptide chain during protein synthesis or signal the termination of protein synthesis.