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An Internet and cable-television supplier surveyed a random sample of their customers. The results are shown in the table.

Satisfaction of Internet and Cable Television Customers

\begin{tabular}{|c|c|c|c|}
\hline & Satisfied & Not satisfied & Total \\
\hline Internet & 1,820 & 212 & 2,032 \\
\hline Cable television & 824 & 285 & 1,109 \\
\hline Total & 2,644 & 497 & 3,141 \\
\hline
\end{tabular}

Which statement about the two-way frequency table is true?

A. The survey represents quantitative data.
B. There is a greater percentage of Internet customers who are not satisfied than cable television customers who are not satisfied.
C. About half of the customers surveyed are cable-television customers.


Sagot :

To analyze the given survey results and determine which statement about the two-way frequency table is true, we'll follow these steps meticulously:

1. Calculate the percentage of Internet customers who are not satisfied:
- Number of Internet customers not satisfied: 212
- Total number of Internet customers: 2,032
- Percentage of Internet customers not satisfied:
[tex]\[ \frac{\text{Number of Internet customers not satisfied}}{\text{Total number of Internet customers}} \times 100 \][/tex]
Using the given values:
[tex]\[ \frac{212}{2032} \times 100 \approx 10.43\% \][/tex]

2. Calculate the percentage of Cable Television customers who are not satisfied:
- Number of Cable Television customers not satisfied: 285
- Total number of Cable Television customers: 1,109
- Percentage of Cable Television customers not satisfied:
[tex]\[ \frac{\text{Number of Cable TV customers not satisfied}}{\text{Total number of Cable TV customers}} \times 100 \][/tex]
Using the given values:
[tex]\[ \frac{285}{1109} \times 100 \approx 25.70\% \][/tex]

3. Calculate the proportion of Cable Television customers among the total surveyed customers:
- Total number of Cable Television customers: 1,109
- Overall total number of customers surveyed: 3,141
- Proportion of Cable Television customers:
[tex]\[ \frac{\text{Total number of Cable TV customers}}{\text{Overall total number of customers}} \][/tex]
Using the given values:
[tex]\[ \frac{1109}{3141} \approx 0.353 \][/tex]

4. Evaluate the statements:

- Statement 1: "The survey represents quantitative data."
- The data provided includes counts and percentages, which are quantitative in nature. This statement appears to be true.

- Statement 2: "There is a greater percentage of Internet customers who are not satisfied than cable television customers who are not satisfied."
- Calculated percentages:
- Internet customers not satisfied: 10.43%
- Cable Television customers not satisfied: 25.70%
- Since 10.43% (Internet) is not greater than 25.70% (Cable TV), this statement is false.

- Statement 3: "About half of the customers surveyed are cable-television customers."
- Proportion of Cable Television customers: approximately 35.3%
- Since 35.3% is significantly less than half (which would be 50% or 0.5), this statement is false.

Thus, the evaluation of the statements based on the provided analysis leads us to conclude the correct statements:

Statement 1: "The survey represents quantitative data." This is true.

Both statement 2 and statement 3 are false based on the calculations provided.

Hence, the only valid statement about the two-way frequency table is that the survey represents quantitative data.