If the pH of 7.22 in tap water was incorrectly recorded as 2.72​, the mean pH would be 
  
enter your response here.

To calculate the correct mean pH, we first need to understand the following:

If the mean pH was calculated using an incorrect value of 2.72 instead of the correct value of 7.22, the new mean would need to be recalculated by replacing the wrong value with the correct one. Let's assume the original dataset included \( n \) pH values, and we already know the incorrect mean.

Here’s how we can approach the correction:

1. Calculate the sum of all pH values before the incorrect pH was identified.
   \[
   \text{Sum of incorrect values} = \text{incorrect mean} \times n
   \]
2. Adjust this sum by subtracting the incorrect pH value and adding the correct pH value.
   \[
   \text{Correct sum} = (\text{incorrect sum} - 2.72) + 7.22
   \]
3. Finally, calculate the correct mean by dividing this corrected sum by \( n \):
   \[
   \text{Correct mean} = \frac{\text{Correct sum}}{n}
   \]

If you provide the number of values \( n \) and the incorrect mean, I can compute the correct mean for you.

Would you like to go through this step in more detail or clarify any specific points? Let me know!

Here are some follow-up questions to expand on this:
1. What was the incorrect mean pH value of the dataset?
2. How many pH measurements were originally taken (i.e., \( n \))?
3. Is the dataset composed solely of tap water measurements, or are there other types of water included?
4. What are the consequences of misrecording the pH value in practical applications?
5. How does the pH scale function in relation to tap water quality?

**Tip:** Always double-check pH measurements, especially in critical calculations, to avoid skewed results.

If the pH of 7.22 in tap water was incorrectly recorded as 2.72, the mean pH would be

Learn how to correct the mean pH of tap water after a data entry error. This example demonstrates the adjustment of the mean by replacing incorrect values with the correct data. It covers key concepts in averages and error correction, suitable for Grades 9-12.

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