Question

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?

Answer 1

Answer:

Sample mean

Symbol: $\frac{}{x}$

Step-by-step explanation:

Given

$Population = 30$

$Sample = 10$

$Mean\ of\ the\ selected\ 10 = 5'2"$

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: $\frac{}{x}$