Summarizing Distributions

Question 0

Principle measures of the spread of a distribution

Answer 0

Range (min and max)
IQR (Q3-Q1)
Variance
Standard deviation

Question 1

Two principle measures of the center of a distribution

Answer 1

Mean
Median
(Mean follows tail)

Question 2

What are sensitive to extreme values?

Answer 2

Mean
Range
Variance
Standard deviation

Question 3

What are not sensitive to extreme values?

Answer 3

Median

IQR

Question 4

The empirical rule applies specifically to…

Answer 4

Symmetric bell-shaped data

Question 5

Restriction for the range of a sample set of data

Answer 5

It can never be greater than the range if the population

Question 6

If the population have a variance of zero, the variance of the sample is…

Answer 6

Also zero

BUT a sample variance of zero does not necessarily mean the population has a variance of zero

Question 7

If the sample has a variance of zero….

Answer 7

The sample mean and the sample median are equal

Question 8

When there are multiple gaps and clusters, what displays give the best overall picture of the distribution?

Answer 8

Stemplot

Histogram

Question 9

If the standard deviation of a set of observations is zero, you can conclude…

Answer 9

That all observations are the same value

Question 10

In stemplots, the number of leaves equals…

Answer 10

The size of the set of data

Question 11

What displays are useful in showing outliers?

Answer 11

Dotplots

Stemplots