The mean of the dataset 10, 15, 20, 25, and 30 is:
Understand the Problem
The question is asking to calculate the mean (average) of the dataset consisting of the numbers 10, 15, 20, 25, and 30.
Answer
The mean is $20$.
Answer for screen readers
The mean of the dataset 10, 15, 20, 25, and 30 is $20$.
Steps to Solve
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List the dataset The dataset consists of the numbers: 10, 15, 20, 25, and 30.
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Sum the numbers Add all the numbers together to get the total. $$ 10 + 15 + 20 + 25 + 30 = 100 $$
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Count the numbers Count how many numbers are in the dataset. Here, there are 5 numbers.
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Calculate the mean Divide the total sum by the count of numbers to find the mean. $$ \text{Mean} = \frac{100}{5} = 20 $$
The mean of the dataset 10, 15, 20, 25, and 30 is $20$.
More Information
The mean, or average, is a measure of central tendency that gives you an idea of the "central" value of a dataset. It is calculated by adding all values together and then dividing by the count of those values.
Tips
- Forgetting to count how many numbers are in the dataset.
- Mixing up the sum and mean calculations, which can lead to incorrect results.
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