Read-only sample study. A complete walkthrough — from problem statement to a validated report — using engagement_scale.csv (200 rows × 9 cols). Sign in to run your own.
Sample study · survey design
Survey Instrument Validation: Reliability of a Student Engagement Scale
Research information
Statement of the problem
This study evaluates whether an eight-item student engagement questionnaire is internally consistent enough to be used in research.
Objectives
- To assess the reliability of the items participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, and prepares_before_class.
- To describe the responses to participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, and prepares_before_class.
Dataset
engagement_scale.csv200 rows × 9 cols
| Column | Kind | Missing | Distinct |
|---|---|---|---|
| sex | categorical | 0 | 2 |
| participates_in_class | numeric | 0 | 5 |
| completes_readings | numeric | 0 | 5 |
| asks_questions | numeric | 0 | 5 |
| joins_group_work | numeric | 0 | 5 |
| seeks_feedback | numeric | 0 | 5 |
| attends_consultations | numeric | 0 | 5 |
| submits_on_time | numeric | 0 | 5 |
| prepares_before_class | numeric | 0 | 5 |
Feasibility & estimateFree
✓ Feasibledesign: survey · via heuristic
Detected a survey design with 9 analyzable variable(s) and 2 analytical question(s). Recommended 4 statistical test(s). Estimated cost: 41 credits.
Recommended analysis
To assess the reliability of the items participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, and prepares_before_class.
Cronbach's Alpha(participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
McDonald's Omega(participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
To describe the responses to participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, and prepares_before_class.
Frequency & Percentage Distribution(participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
Weighted Mean with Verbal Interpretation(participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
Dataset Complexity14
Statistical Tests12
AI Interpretation6
Visualizations4
Report Generation5
Total to run41 credits
Estimated runtime: ~50-100 seconds
ResultsComputed
4 tests41 credits
Cronbach's Alpha (participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
α0.876N200
Internal consistency is good (alpha = 0.876).
McDonald's Omega (participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
N200
| item | loading |
|---|---|
| participates_in_class | 0.666 |
| completes_readings | 0.667 |
| asks_questions | 0.713 |
| joins_group_work | 0.647 |
| seeks_feedback | 0.734 |
| attends_consultations | 0.647 |
| submits_on_time | 0.760 |
| prepares_before_class | 0.653 |
Internal consistency (McDonald's omega) is good (omega = 0.877).
Frequency & Percentage Distribution (participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
| count | value | percent | variable |
|---|---|---|---|
| 55 | 3 | 27.500 | participates_in_class |
| 51 | 4 | 25.500 | participates_in_class |
| 45 | 5 | 22.500 | participates_in_class |
| 34 | 2 | 17 | participates_in_class |
| 15 | 1 | 7.500 | participates_in_class |
| 65 | 3 | 32.500 | completes_readings |
| 48 | 4 | 24 | completes_readings |
| 47 | 2 | 23.500 | completes_readings |
| 28 | 5 | 14.000 | completes_readings |
| 12 | 1 | 6 | completes_readings |
| 54 | 3 | 27 | asks_questions |
| 51 | 4 | 25.500 | asks_questions |
| 42 | 5 | 21 | asks_questions |
| 37 | 2 | 18.500 | asks_questions |
| 16 | 1 | 8 | asks_questions |
| 55 | 2 | 27.500 | joins_group_work |
| 43 | 3 | 21.500 | joins_group_work |
| 42 | 4 | 21 | joins_group_work |
| 34 | 1 | 17 | joins_group_work |
| 26 | 5 | 13 | joins_group_work |
| 67 | 4 | 33.500 | seeks_feedback |
| 56 | 3 | 28.000 | seeks_feedback |
| 30 | 5 | 15 | seeks_feedback |
| 27 | 2 | 13.500 | seeks_feedback |
| 20 | 1 | 10 | seeks_feedback |
| 63 | 4 | 31.500 | attends_consultations |
| 49 | 3 | 24.500 | attends_consultations |
| 39 | 2 | 19.500 | attends_consultations |
| 35 | 5 | 17.500 | attends_consultations |
| 14 | 1 | 7.000 | attends_consultations |
| 54 | 3 | 27 | submits_on_time |
| 51 | 4 | 25.500 | submits_on_time |
| 38 | 2 | 19 | submits_on_time |
| 35 | 1 | 17.500 | submits_on_time |
| 22 | 5 | 11 | submits_on_time |
| 61 | 3 | 30.500 | prepares_before_class |
| 51 | 4 | 25.500 | prepares_before_class |
| 35 | 5 | 17.500 | prepares_before_class |
| 29 | 2 | 14.500 | prepares_before_class |
| 24 | 1 | 12 | prepares_before_class |
Weighted Mean with Verbal Interpretation (participates_in_class, completes_readings, asks_questions, joins_group_work, seeks_feedback, attends_consultations, submits_on_time, prepares_before_class)
N200
| n | sd | item | rank | median | weighted mean | interpretation |
|---|---|---|---|---|---|---|
| 200 | 1.218 | participates_in_class | 1 | 3 | 3.385 | Neutral |
| 200 | 1.120 | completes_readings | 6 | 3 | 3.165 | Neutral |
| 200 | 1.224 | asks_questions | 2 | 3 | 3.330 | Neutral |
| 200 | 1.293 | joins_group_work | 8 | 3 | 2.855 | Neutral |
| 200 | 1.178 | seeks_feedback | 4 | 3 | 3.300 | Neutral |
| 200 | 1.178 | attends_consultations | 3 | 3 | 3.330 | Neutral |
| 200 | 1.260 | submits_on_time | 7 | 3 | 2.935 | Neutral |
| 200 | 1.241 | prepares_before_class | 5 | 3 | 3.220 | Neutral |
Overall weighted mean = 3.19, interpreted as “Neutral”.
The interpretation bands assume a 1-5 scale. State the instrument's scale if it differs. · Weighted means treat the rating scale as equal-interval, which is the standard convention for summarising Likert items but is a descriptive summary, not a statistical test. The median is reported beside each mean as the measure that does not require that assumption.
Report
Publication-ready report
Tests used · Results · Discussion — generated from the computed statistics.
Every claim checked · 10 numbers verified · prose: llm:gemini
Reproducible code
Download the exact Jupyter notebook or Python script that reproduces these results with widely-used libraries (scipy, statsmodels, lifelines).
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