To find the mean of the listed numbers, follow these steps:

1. List the numbers:

   • 53, 68, 70, 67, 76, 38, 30, 61, 42, 35

2. Add all the numbers together: $53 + 68 + 70 + 67 + 76 + 38 + 30 + 61 + 42 + 35 = 540$

3. Count the total number of values:

   • There are 10 numbers.

4. Calculate the mean: $\text{Mean} = \frac{\text{Sum of the numbers}}{\text{Number of values}} = \frac{540}{10} = 54.0$

So, the mean is 54.0.

Answer:

A. The mean is 54.0 (rounded to one decimal place).

Would you like to explore the median and mode, or have any other questions?

Here are 5 questions to deepen your understanding:

1. What is the formula for finding the median of a data set?
2. How does the mode differ from the mean and median?
3. Why might there be no mode in a data set?
4. How does the size of a sample affect the mean?
5. What are some situations where the median is more useful than the mean?

Tip: Always arrange numbers in order when calculating the median!