Calculating the Sample Mean (x bar): A Step-by-Step Guide in Statistics

x bar

In statistics, “x bar” (pronounced as “x bar”) represents the sample mean

In statistics, “x bar” (pronounced as “x bar”) represents the sample mean. It is a mathematical notation used to denote the average or central tendency of a sample.

To calculate x bar, you need to follow these steps:
1. Add up all the values in your sample.
2. Count the number of values in your sample.
3. Divide the sum of the values by the count.

For example, let’s say you have a sample of 5 numbers: 10, 15, 20, 25, and 30.

Step 1: Add up all the values:
10 + 15 + 20 + 25 + 30 = 100

Step 2: Count the number of values:
There are 5 values in the sample.

Step 3: Divide the sum by the count:
100 / 5 = 20

The sample mean (x bar) for this sample is 20. So, x bar represents the average of the sample, which is 20 in this case.

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