Suggestions for Follow-up Actions (KS3-DH3-2)
Possible problems in students' learning (for reference only)
- Students fail to understand the concept of grouped data.
- Students confuse data on the horizontal axis with the cumulative frequency on the vertical axis.
- Students fail to take into account the frequency of each group when calculating the mean of grouped data.
- Students confuse the median with its position when finding the median from cumulative frequency polygon/ curve.
Suggestions for Follow-up Actions
| Name | Emphasis | Description | Problem addressed (see above) | Suggested duration (minutes) | Available for self - learning? |
|---|---|---|---|---|---|
Finding the Mean from Grouped Data |
Finding mean, median and mode from a set of grouped data | "Finding the Mean from Grouped Data" is a classroom activity in which students can acquire an understanding of the concept of mean of grouped data and its calculation. | 
|
25 |  |
Finding the Modal Class from Grouped Data |
"Finding the Modal Class from Grouped Data" is a classroom activity in which students can acquire an understanding of the concept of modal class of grouped data and its calculation. |
|
20 | |
|
Finding the Median from Cumulative Frequency Polygon |
"Finding the Median from Cumulative Frequency Polygon" is a PowerPoint presentation in which students can acquire an understanding of the concept of median of grouped data and its calculation. |
|
15 |  |
|
Exercises on the Measures of Central Tendency  |
"Exercises on The Measures of Central Tendency" is an interactive exercise which offers appropriate feedback for students to find out mean, median and mode from grouped data. |
|
20 | |
* The list of possible problems is for teachers' reference only and is not meant to be exhaustive or prescriptive. Teachers can always adapt the activities/materials in order to cater for students' needs.
Other Resources
-
Education Bureau - Mathematics Education
http://www.edb.gov.hk/index.aspx?nodeid=2403&langno=1 -
Hong Kong Education City - Resources Library : Resources Bank > Junior Secondary > Mathematics Education > Mathematics > Secondary One > Analysis and Interpretation of data > Measures of Central Tendency
http://www.hkedcity.net/resources/ires/ires_browse.phtml?type=list&res_cat_id=2596 -
Hong Kong Education City - Resources Library : Resources Bank > Junior Secondary > Mathematics Education > Mathematics > Secondary Two > Analysis and Interpretation of data > Measures of Central Tendency
http://www.hkedcity.net/resources/ires/ires_browse.phtml?type=list&res_cat_id=2640 -
Hong Kong Education City - Resources Library : Resources Bank > Junior Secondary > Mathematics Education > Mathematics > Secondary Three > Analysis and Interpretation of data > Measures of Central Tendency
http://www.hkedcity.net/resources/ires/ires_browse.phtml?type=list&res_cat_id=2684 -
Education Bureau - Stat.Net
http://www.hked-stat.net/common/index.htm -
Census and Statistics Department
http://www.censtatd.gov.hk/ -
Hong Kong Observatory
http://www.weather.gov.hk -
Environmental Protection Department
http://www.epd.gov.hk/epd/ -
Website on Climate Change
http://resources.edb.gov.hk/envir-ed/globalissue/c_m2_1_1.htm -
The Royal Statistical Society
http://www.rss.org.uk/ -
Statistics Canada - Education Resources
http://www.statcan.ca/english/edu/index.htm
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