Chapter 2 Review Quiz

A set of scores ranges from a high of X = 142 to a low of X = 65. Why would it NOT be reasonable to display these scores in a regular frequency distribution table?

• There's not enough information.

• There would be too many rows to address each score.

• They should be displayed in a bar graph rather than a frequency table.

• None of the above

Answer explanation

Since there is a wide-ranging of scores, it is important to utilize groped frequency tables in order to condense the rows. This makes the table more organized and easier to read/process information.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

In a grouped frequency table, you cannot determine the frequency for any specific score individually.

• True

• False

Answer explanation

In a grouped frequency distribution table, there is no way to determine how many individuals had a specific score.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

What type of frequency distribution is being described in this statement: essentially the same as a histogram, except that spaces are left between adjacent bars.

• Histogram

• Pie Chart

• Polygon

• Bar Graph

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Discrete variables that are measured on a nominal scale should more than likely use what type of frequency distribution graph?

• Histogram

• Bar Graph

• Pie Chart

• Polygon

Answer explanation

A bar graph utilizes spaces that are left between adjacent bars and often times work on a nominal scale with discrete variables.

Based on the graph, which of the following statements must be true?

• The graph is positively skewed, making the mean greater than the median

• The graph is negatively skewed, making the mean greater than the median.

• The graph is positively skewed, making the median greater than the mean.

• The graph is negatively skewed, making the median greater than the mean.

Answer explanation

In a positively skewed graph, the mean is being pulled HIGHER, making it greater than both the median and mode.

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

If you have a negatively skewed graph with a Mode = 16 and a Mean = 12, what is true about the median?

• The median is 15.

• The median is 14.

• The median must be between 12 and 16.

• The median cannot be determined.

Answer explanation

In a negatively skewed distribution, the mean is the lowest recorded number while the mode will be the highest recorded number. The median lies between the mean and mode, leading us to say the median must be between 12 and 16.

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Which of the following statements accurately describes the graph presented?

• The graph is positively skewed.

• The graph is bimodal.

• The graph is unimodal.

• The graph is a normal bell curve.