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- [ CMP - Comparing and Scaling ]
(Check the Essential Learnings and Grade Level Equivalent numbers here.) [They look like 1.1.6 for the essential learnings (and grade level equivalents) and NS01 for the item specifications.
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3-6-2006 Math 2a
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1. HOMEWORK due today: Percentage Proportion Worksheet 2
2. Complete Central Tendencies - data checklist
OBJECTIVE: (1.4.3 Apply data collection processes to inform, persuade, or answer questions. 1.4.4 Understand how variations in data may affect the choice of data analysis techniques used.)(1.4.5 Understand and apply various data display techniques including box-and-whisker plots., 1.4.6 Evaluate how different representations of the same set of data can support different points of view.)4.1.1 Apply a planning process to collect information for a given purpose. * Formulate a question and collect data from a population considering how the questions, collection method, and sample population affect the results. [1.4.3] ACTIVITIES/ASSESSMENT: Data Collection. Students will collect data about the average student in their class according to the guidelines established and the categories selected. Start work on the central tendencies - Mean, Median and Mode. NOTES: HOMEWORK: Complete, legible dataset.
3-7-2006 Math 2a
Central Tendencies
Mean - The mean is obtained by adding all of the data entries and dividing by the number of data entries.
Median - The median is obtained by ordering all of the data from least to greatest (do not leave out any numbers) and counting to the middle of the list. The number in the middle is the median. If there are two numbers in the middle, add them together and divide by 2 to find the median value.
Mode - To obtain the mode, find the value that appears the most often. If there is a tie, there can be more than one mode.
1. HOMEWORK due today: Complete legible dataset.
2. Central tendencies by category
OBJECTIVE: See 3-6 above. ACTIVITIES/ASSESSMENT: Students will ensure that data has been collected and is accurate. Central tendencies for each category will be established. (time permitting, data can be entered onto computers). Develop scatterplots. Students can plot height vs age. NOTES: HOMEWORK: Complete scatterplot ht vs age
3-8-2006 Math 2a
1. HOMEWORK due today: Complete scatterplot ht vs age
2. Stem/Leaf and Box/Whisker plots
OBJECTIVE: ACTIVITIES/ASSESSMENT: Stem/Leaf and Box/Whisker plots - introduction and comparison with line plots. These are plots of central tendencies. NOTES: HOMEWORK: TBA - Some specific Stem/Leaf and Box/Whisker Plots
Stem and leaf plots are made by physically dividing the data entries into 'stems' and 'leafs.' Typically, a leaf is anumber in the ones place and the stem would be the remainder of the number. For example, 243 might be divided into a stem of 24 and a leaf of 3 (24|3). The purpose is to show the distribution of the data in the right column. Please check the links above and keep good notes. 
3-9-2006 Math 2a
The Box and Whisker Plot is based on the idea of medians (see above). The first median is still called the median. The part called the lower quartile is the median of the bottom half of the data; the upper quartile is the median of the top half of the data. The lower extreme is the smallest amount, the upper extreme is the highest amount.
1. HOMEWORK due today: HOMEWORK: TBA - Some specific Stem/Leaf and Box/Whisker Plots
2. Data Crunching
OBJECTIVE: (4.2.1 Apply organizational skills for a given purpose., 4.2.2 Apply communication skills to clearly and effectively express or present ideas and situations using mathematical language or notation.) ACTIVITIES/ASSESSMENT: Completion of calculations for central tendency. Select appropriate categories for stem/leaf and box/whisker analysis. NOTES: HOMEWORK: TBA
3-10-2006 Math 2a
1. HOMEWORK due today: TBA
OBJECTIVE: See 3-9 above. ACTIVITIES/ASSESSMENT: Time permitting/equipment available, computer analysis of data for ideas for report generation. NOTES: HOMEWORK:
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