H

What would the location of the 83rd percentile be for a data set with 40 observations?

34.03

For the following ordered set of data, find the 40th percentile. 0, 2, 4, 5, 5, 6, 7, 7, 8

5

In the contingency table shown, which dealership had more than half of their sales above median profit?

Tionesta

Which one of the following pairs of variables would be best-suited for a contingency table?

Favorite Color and Gender

If a set of data exhibits significant positive skewness, then which of the following would be expected of Pearson's coefficient of skewness?

The coefficient should be close to 3.

Which one of these statements is not part of the description of a scatter diagram?

The data points are connected to create a graph.

Dot plots allow one to observe which of the following? Select all that apply.

The spread in a distribution. The shape of a distribution. The center of a distribution.

What is the measure of position called below which 75% of the observations occur?

The third quartile

What is the function of "quartiles"?

To divide a set of observations into four equal parts

What would the location of the 11th percentile be for a data set with 50 observations?

5.61

Choose the statement that best describes a scatter diagram.

A graphical technique to show the relationship between two variables,

Contingency tables are used for summarizing data of what level? Select all that apply.

Nominal Ordinal

For a given data set, suppose Q1 = 70, Q2 = 80, Q3 = 100. Which of the following is true about outliers?

An observation of 20 would be an outlier.

In the contingency table shown, how many below median profit sales were made by the Sheffield dealership?

26

For the following ordered set of data, find the 25th percentile. 0, 0, 2, 3, 5, 5, 6, 7, 7, 8, 9, 10, 11, 13, 14

3

Which of the following are features of a dot plot? Select all that apply.

One dot for each observation. Dots "piled up" for observations very close together. A horizontal line indicating the possible values of the data.

When you create a dot plot, you do which of these operations? Select all that apply.

Place a dot along a horizontal scale for each observation. "Pile up" dots that are too close to show separately.

For a given data set, suppose Q1 = 40, Q2 = 45, Q3 = 50. Also, suppose that the three smallest observations are 20, 24, and 28. Which of the following is true about the box plot for this data set?

There would be two asterisks plotted to indicate outliers at 20 and 24.

Which one of the following formulas is Pearson's Coefficient of Skewness?

sk=3(X−Median)s

A dot plot would be appropriate to display which one of the following kinds of data?

A small set of data.

What statements below describe the relative use of dot plots and histograms? Select all that apply.

Histograms are more useful for large data sets. Dot plots are most useful for small data sets.

Which of the following is not a measure of position?

standard deviation

Each of the following is a measure of position in a set of data except:

the standard deviation

Suppose a given data set has the following characteristics: Minimum value: 120 Q1: 160 Q2: 190 Q3: 200 Maximum Value: 220 Which of the following is true about the distribution of the data?

The distribution is negatively skewed.

The interquartile range is a measure of dispersion usually used along with the median. What is the definition of interquartile range?

The distance between the first and third quartile.