Answer:
Sample mean
Symbol: [tex]\frac{}{x}[/tex]
Step-by-step explanation:
Given
[tex]Population = 30[/tex]
[tex]Sample = 10[/tex]
[tex]Mean\ of\ the\ selected\ 10 = 5'2"[/tex]
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: [tex]\frac{}{x}[/tex]
