Q 3.15 - Elementary Statistics

Question

Explain what each of symbol represents:

$a)\sum _{} b) n c)\stackrel{-}{x}$

Step-by-Step Solution

Answer

$a) \sum _{}-$Summation means the sum of all the observation.

$b) n-$ Sample size, means the number of the observations in the sample.

$c) \stackrel{-}{x}-$Sample mean, means the mean of the observations for a sample.

Step 1. Given information.

Explain what each of symbol represents:

$a)\sum _{} b) n c)\stackrel{-}{x}$

Step 2. Explanation for each symbol.

Summation $\sum _{}$ means the sum of all the observation.

Sample size, $n$ means the number of the observations in the sample.

Sample mean $\stackrel{ -}{x}$means the mean of the observations for a sample.