Standard Deviation and Variance Review

Which of the following is a measure of variability?

• mean

• median

• mode

• standard deviation

What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}

• 293.67

• 15.87

• 17.14

• 41.98

Compare the centers and variation.

• Math has a higher median (center) and more variation.

• Math has a higher median (center) and less variation.

• Math has a lower median (center) and less variation.

• Math has a lower median (center) and more variation.

Which data set shows more variability? Explain your answer.

• Female

• Male

• Not enough information

It is indicated that the values of random variables tend to be very close to the mean, and to each other.

• Large standard deviation

• Small variance

• Large variance

• Small standard deviation

The area of every individual rectangle in probability histogram is determined by the __________________.

• Variance

• Standard Deviation

• Horizontal Axis

• Vertical Axis

It is indicated that the values of random variables are far from the mean, and from one another.

• Small variance

• Large standard deviation

• Large variance

• small standard deviation

Tell whether the distribution has a small or large variance

• Small variance

• Large variance

Given the probability histogram. Compute the actual variance.

• 1.1860

• 1.1870

• 1.1875

• 1.1890

Tell whether the distribution has a small or large variance.

• Large variance

• Small variance