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Mimidj9279
09.02.2021 •
Mathematics
A teacher randomly selects 10 out of her 30 students and finds that the mean height of those 10 students is 5′2". Is this a sample mean or a population mean, and which symbol would be used to denote it?
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Ответ:
Sample mean
Symbol:![\frac{}{x}](/tpl/images/1103/0848/278ba.png)
Step-by-step explanation:
Given
Solving (a): Is it sample mean or population mean
From the question, we understand that 10 were selected from a total of 30.
And the mean of the selected 10 is 5'2"
The selected 10 is referred to as sample and the mean of the 10 is the sample mean
Solving (b): Symbol to use.
The symbol for sample mean is:![\frac{}{x}](/tpl/images/1103/0848/278ba.png)
Ответ:
The answer is B