3. Describing Data Numerically

Given the population data set $3,1,2,9,5$, what is the standard deviation of this population (rounded to two decimal places)?

What is the most likely effect on the $standarddeviation$ of a data set if the $outlier$ were removed from the data set?

$\mathrm{As} \mathrm{the} \mathrm{mean} \mu \mathrm{increases} \mathrm{in} a \mathrm{normal} \mathrm{distribution}, \mathrm{what} \mathrm{happens} \mathrm{to} \mathrm{the} \mathrm{graph} \mathrm{of} \mathrm{the} \mathrm{normal} \mathrm{curve}?$

Which of the following is not a property of the $standard deviation$?

A population has a mean of $\mu$ = $9$ and a sum of scores $\Sigma x$ = $54$. How many scores are in the population?

In the context of displaying error bars on a graph, which quantity is most commonly used to represent the variability of the data?

Given the data set consisting of a single value $10$, what is the standard deviation of this set?