Use measures of center and measures of variability for numerical data from random samples to draw informal comparative references about two populations.

• Example: Decide whether the words in a chapter of a seventh-grade science book are generally longer than the words in a chapter of a fourth-grade science book.

ACOS 2009 Correlation
• 8 - Determining the distance between two points on a scale drawing or a map using proportional reasoning.

• 12.1 - Using a data set to create charts and graphs, including histograms, frequency tables, and stem-and-leaf plots, to display measures of central tendency.

• 13 - Use given and collected data from samples or populations to construct graphs and interpret data.
• 13.2 - Determining the measure of central tendency that is the most appropriate for a given situation.
Algebra I
• 12 - Compare various methods of data reporting, including scatterplots, stem-and-leaf plots, histograms, box-and-whiskers plots, and line graphs, to make inferences and predictions.
• 13 - Identify characteristics of a data set, including numerical or categorical and univariate or bivariate.

CMP2 Correlation
 Book Investigation Objective Data Distributions 2-4 7-SP4

Resources
North Carolina's Lesson for Learning
X Marks the Spot - 7SP3, 7SP4
• I can create a dot plot.
• I can find mean, median, and mode.
• I can find the lower and upper extremes, lower and upper quartiles, and the range.
• I can create a box plot.
• I can interpret data in a box plot.

My Humble Opinion
Skills
• Determine measures of center (mean, median, mode) and measures of variability (range, interquartile range, mean absolute deviation or variance, and standard deviation)
Measures of center and range were found in ACOS 2003/2009. Interquartile range, mean absolute deviation, and standard deviation are new. Interquartile range has moved down from 8th grade. Deviation has moved down from high school.