What age groups use social networking sites? A recent study produced the following dat about 768 individuals who were asked their age and which of three social networking sit they used most often. (People who did not use such sites were excluded from the study). Age Group (Years) 25 – 44 Web site 0 - 24 45 – 64 Over 65 Totals | Facebook 77 105 114 12 308 Twitter 46 110 81 7 244 LinkedIn 15 97 95 9 216 Totals 138 312 290 28 768 Suppose one subject from this study was selected at random. Give your answer in reduced (simplified) fraction. (Example: 1/2) Find the probability that the selected subject preferred Twitter.

MATLAB: An Introduction with Applications
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**Title: Social Networking Site Usage Across Different Age Groups**

**Introduction**  
A recent study surveyed 768 individuals regarding their preferred social networking sites and categorized the data based on age. Individuals who did not use social networking sites were not included in this study.

**Data Table: Social Networking Site Preference by Age Group**

| Age Group (Years) | Facebook | Twitter | LinkedIn | Totals |
|-------------------|----------|---------|----------|--------|
| 0–24              | 77       | 46      | 15       | 138    |
| 25–44             | 105      | 110     | 97       | 312    |
| 45–64             | 114      | 81      | 95       | 290    |
| Over 65           | 12       | 7       | 9        | 28     |
| **Totals**        | 308      | 244     | 216      | 768    |

**Analysis and Calculations**  
- **Probability Calculation**:  
  To find the probability that a randomly selected individual from the study preferred Twitter, we examine the total number of Twitter users compared to the overall participants.

  Number of Twitter users = 244  
  Total participants = 768  

  Probability = 244/768  
  Simplified, this reduces to 61/192.

**Conclusion**  
The probability that a randomly selected individual from this study preferred Twitter is 61/192.

This data provides insight into the varying preferences of social networking sites across different age demographics, highlighting Twitter's popularity among the surveyed population.
Transcribed Image Text:**Title: Social Networking Site Usage Across Different Age Groups** **Introduction** A recent study surveyed 768 individuals regarding their preferred social networking sites and categorized the data based on age. Individuals who did not use social networking sites were not included in this study. **Data Table: Social Networking Site Preference by Age Group** | Age Group (Years) | Facebook | Twitter | LinkedIn | Totals | |-------------------|----------|---------|----------|--------| | 0–24 | 77 | 46 | 15 | 138 | | 25–44 | 105 | 110 | 97 | 312 | | 45–64 | 114 | 81 | 95 | 290 | | Over 65 | 12 | 7 | 9 | 28 | | **Totals** | 308 | 244 | 216 | 768 | **Analysis and Calculations** - **Probability Calculation**: To find the probability that a randomly selected individual from the study preferred Twitter, we examine the total number of Twitter users compared to the overall participants. Number of Twitter users = 244 Total participants = 768 Probability = 244/768 Simplified, this reduces to 61/192. **Conclusion** The probability that a randomly selected individual from this study preferred Twitter is 61/192. This data provides insight into the varying preferences of social networking sites across different age demographics, highlighting Twitter's popularity among the surveyed population.
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