What Sample mean is
The sample mean is a statistic that is used to represent the central tendency, or average, of a sample of data. It is calculated by taking the sum of all values in the sample and dividing by the number of values in the sample.
Steps for calculating the sample mean:
-
Gather the data values from the sample.
-
Calculate the sum of all the values in the sample.
-
Divide the sum of the values by the number of values in the sample.
-
The result is the sample mean.
Examples
-
A survey is conducted to determine the average number of hours per week people sleep. The sample mean is used to estimate the population mean.
-
A grocery store wants to calculate the average amount spent by customers on their weekly shopping trips. The sample mean is calculated using the data from customers who provided receipts.
-
A health clinic is interested in determining the average blood pressure of its patients. The sample mean is used to estimate the population mean.