QMB

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

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

What would the location of the 83rd percentile be for a data set with 40 observations? Multiple choice question. 34.03 32.00 40.00 33.20

34.03

For the following ordered set of data, find the 60th percentile. 0, 2, 3, 5, 5, 6, 8, 10, 10, 11, 12, 14, 16

10

Drag and drop the set of observations against their corresponding number of divisions

100 matches Choice percentiles 10 matches Choice deciles 4 matches Choice quartiles 2 matches Choice median

For the following ordered set of data, find the 40th percentile. 0, 2, 4, 5, 5, 6, 7, 7, 8 Multiple choice question. 5 3.6 2 4

5

For a given data set, suppose Q1 = 70, Q2 = 80, Q3 = 100. Which of the following is true about outliers? Multiple choice question. An observation less than 100 would be an outlier. An observation of 20 would be an outlier. An observation of 140 would be an outlier. An observation less 70 or greater than 100 would be an outlier.

An observation of 20 would be an outlier.

Identify the shape of the distribution shown in the picture. Multiple choice question. Negatively Skewed Positively Skewed Bimodal Symmetrical

Negatively Skewed

Which of the following is true regarding dot plots and histograms? Multiple choice question. Histograms are easier to construct. Dot plots work better for large data sets. Dot plots do not lose the identity of individual observations.

Dot plots do not lose the identity of individual observations.

Which of the following are features of a dot plot? Select all that apply. Multiple select question. Dots "piled up" for observations very close together. One dot for each observation. A line connecting the dots that represent individual observations. A horizontal line indicating the possible values of the data.

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

If you found that your GPA was in the 8th decile at your university, you could conclude that 80% of the students had a GPA higher than yours. True false question.

False

Match the quartiles on the left with their definition on the right. First Quartile First Quartile Drop zone Separates the bottom 25% of the data from the upper 75% correct Toggle Button Unavailable. Separates the bottom 25% of the data from the upper 75% Second Quartile Second Quartile Drop zone Separates the bottom 50% of the data from the upper 50% correct Toggle Button Unavailable. Separates the bottom 50% of the data from the upper 50% Third Quartile

First Quartile matches Choice Separates the bottom 25% of the data from the upper 75% Second Quartile matches Choice Separates the bottom 50% of the data from the upper 50% Third Quartile matches Choice Separates the bottom 75% of the data from the upper 25%

What statements below describe the relative use of dot plots and histograms? Select all that apply. Multiple select question. Dot plots show the relative frequency of data values. Histograms are more useful for large data sets. Dot plots are most useful for small data sets. Histograms are easier to construct.

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

Dot plots allow one to observe which of the following? Select all that apply. The center of a distribution. The relationship between two nominal variables. The shape of a distribution. The spread in a distribution.

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

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.

Choose the correct formula for the location, Lp ,from n observations where P is the desired percentile. Multiple choice question. Lp =(n+1)P100�100 Lp=(n-1)100P100� Lp =(n-1)P100�100 Lp=nP100

Lp =(n+1)P100

When you create a dot plot, you do which of these operations? Select all that apply. Multiple select question. Place a dot along a horizontal scale for each observation. Connect adjacent dots to create a polygon. Add a vertical axis showing frequency of observations. "Pile up" dots that are too close to show separately.

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

For the scatter diagram shown here, what kind of relationship do you see between the variables? Multiple choice question. Weak positive relationship. Strong negative relationship. Strong positive relationship. Moderate positive relationship.

Strong positive relationship.

Identify the shape of the distribution shown in the picture. Multiple choice question. Negatively Skewed Positively Skewed Bimodal Symmetrical

Symmetrical

Which one of these statements is not part of the description of a scatter diagram? Multiple choice question. The data points are connected to create a graph. One variable is scaled on the horizontal axis, the other on the vertical axis. It may show a relationship or lack of relationship between two variables. Each observation is measured with two variables.

The data points are connected to create a graph.

The interquartile range is a measure of dispersion usually used along with the median. What is the definition of interquartile range? Multiple choice question. The size of a quartile. The number of observations in a quartile. The distance between the first and second quartile. The distance between the first and third quartile.

The distance between the first and third quartile.

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? Multiple choice question. The distribution is symmetrical. The distribution is positively skewed. The distribution is negatively skewed. Nothing can be said about the skew of the distribution.

The distribution is negatively skewed.

What is the measure of position called below which 75% of the observations occur? Multiple choice question. The third decile One standard deviation above the mean, The 25th percentile The third quartile

The third quartile

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? Multiple choice question. There would be one asterisk plotted to indicate an outlier at 20. There would be three asterisks plotted to indicate outliers at 20, 24, and 28. There would be no asterisks plotted, indicating no outliers. There would be two asterisks plotted to indicate outliers at 20 and 24.

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? Multiple choice question.

sk=3(X−Median)/s

Each of the following is a measure of position in a set of data except: Multiple choice question. the median the standard deviation the quartiles the deciles

the standard deviation