Performance task rubric · Data and Descriptive Statistics, Random Sampling, The Normal Distribution

Statistical investigation and survey report

Task. Pose a question about your school or barangay (e.g. daily travel time, allowance spent on snacks, hours of sleep). Choose a random sampling method, collect at least 30 responses, organise the data in tables and graphs, compute measures of centre and spread using a spreadsheet or Jamovi, and write a short report with conclusions and limitations.

Learner / group

Criteria	4 · Excellent	3 · Proficient	2 · Developing	1 · Beginning	Weight	Score
Question and sampling design	Question is clear and measurable; sampling method is random, described, and appropriate for the population.	Clear question; sampling method described but with a minor bias risk.	Question vague or sample is convenience-based without acknowledgement.	No clear question or sampling plan.	20%	—
Comment on “Question and sampling design”
Data organisation and graphs	Frequency tables and graphs are correct, appropriate to the data type, labelled and titled.	Correct tables and graphs with a missing label.	Graph type does not suit the data or values are mis-plotted.	No tables or graphs.	20%	—
Comment on “Data organisation and graphs”
Measures of centre and spread	Mean, median, mode, range and standard deviation are correct and the most suitable measure is chosen and explained.	Measures are correct; choice of measure not explained.	One or two measures incorrect.	Measures missing or mostly incorrect.	25%	—
Comment on “Measures of centre and spread”
Interpretation and conclusions	Conclusions answer the question, are supported by the statistics, and note limitations and possible bias.	Conclusions are supported; limitations briefly noted.	Conclusions go beyond the data or ignore limitations.	No conclusions.	25%	—
Comment on “Interpretation and conclusions”
Use of technology	Spreadsheet or Jamovi output is included and matches hand-checked values.	Technology used; no hand check.	Technology used only for typing.	No technology used.	10%	—
Comment on “Use of technology”
Total					100%	0/5 scored

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