3. Describing Data Numerically

Which of the following best describes the relationship between $\mathrm{variance}$ and $\mathrm{standard\; deviation}$ for a data set?

Which three quantities are required to calculate the variance of a data set?

Which of the following is the correct formula for the population variance?

If a set of data has a standard deviation of $0$, which of the following must be true about the data?

If an observation has a z-score of $0$, which of the following is true?

In a normal distribution, which of the following statements is true regarding the $\mathrm{mean}$ and the $\mathrm{median}$?

$Which\; characteristic\; of\; data\; is\; a\; measure\; of\; the\; amount\; that\; the\; data\; values\; vary?$

Given the sample data set: $2$, what is the standard deviation of this sample?

If the standard deviation for a sample is $s=9$, what is the variance of the sample?

A sample of $n=15$ scores has a mean of $m=20$ and a sample variance of $s^2=9$. What is the sample standard deviation?

Which of the following is the most common measure of total risk in statistics? i. $\mathrm{variance}$ ii. $\mathrm{standard\; deviation}$ iii. $\sqrt{\mathrm{variance}}$

Which of the following best describes the relationship between the $standarddeviation$ and the $precision$ of a procedure?