2026-W32
Foreign‑exchange and FDI diagram errors drive weakest performance
This week’s quizzes show solid grasp of introductory concepts but consistent errors on how FDI, remittances and inflation shift foreign‑exchange supply and demand.
Published August 16, 2026
Total quiz attempts
27
Unique learners
10
Average score
75.93%
Topic with most wrong items
Global Economy (unit 4.5) — FX/FDI
Longest average question time
FX price question ~87.6s
1. Weekly Overview
Strong basics; confusion on FX flows and FDI effects
Aggregate results (27 attempts, 10 learners) show high accuracy on core introduction items while several Global Economy (unit 4.5) questions about how FDI, remittances and inflation affect the dollar had very low or zero correct responses. Time spent on FX and some demand questions was much higher than average, suggesting careful but error‑prone reasoning.
Student takeaway: Focus next on diagramming how FDI, remittances and inflation shift currency supply and demand, and practise a few quick stepwise checks for each scenario.
2. Key Patterns
Main Insights
Clear weakness: interpreting how FDI and remittances affect currency supply
Several unit 4.5 questions about outward/inward FDI and remittance flows had the lowest accuracy (including multiple items with 0% correct). Learners struggle to map financial flows to shifts in the USD supply curve.
Advice: Practice a small set of FX scenarios (inward FDI, outward FDI, remittances, and capital inflows/outflows) and draw supply/demand shifts step by step: identify which market actor supplies or demands the currency, then shift the curve and state the price effect.
Strength: core introductory concepts are well understood
Multiple introduction questions (unit 1.1 and 1.2) reached very high or perfect accuracy, indicating solid conceptual foundations for sectors, sustainability and opportunity cost.
Advice: Keep using short concept-check quizzes to maintain accuracy; use these foundations as anchors when tackling linked macro topics.
High time-on-question in FX and demand items suggests careful but slow reasoning
Some hard FX and demand items attracted much longer average times (60–87 s). For some questions this correlated with correct answers, showing careful problem solving; for others it accompanied high error rates, indicating hesitation.
Advice: When you spend a long time, pause to use a checklist: (1) identify the actor, (2) decide which currency they supply/demand, (3) shift the correct curve, (4) state the price outcome — this reduces stray reasoning paths.
3. Revision Plan
Priority Areas
Foreign exchange market shifts (FDI, remittances, inflation) · 4.5
Multiple questions on FX supply/demand and FDI showed very low accuracy, including items with 0% correct.
Action: Create and practise 6–8 two‑step diagram problems (identify actor → shift curve) and check answers against model solutions.
PPC assumptions and opportunity cost · 1.1
PPC core assumption question had low correct rate despite strong performance on other intro items.
Action: Review PPC assumptions with one worked example and do 4 targeted MCQs that contrast assumptions (fixed resources, technology).
Monetarist theory (Friedman) · 1.2
A medium‑difficulty question on the monetarist school had >50% wrong responses, indicating conceptual gaps.
Action: Summarise monetarist claims in 6 bullet points and test with two short application questions linking money supply to inflation expectations.
Demand shifts and quick diagram checks · 2.1
A demand‑shift question showed high time spent and low accuracy, so speed and correct identification need practice.
Action: Practice 8 short demand-shift sketches with 30‑second timing, verbalise the reason for each shift aloud.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Which of the following is a core assumption of the PPC model? | Introduction to Economics | 1.1 | 8 | 37.5% | 62.5% | 11.7 s |
| Milton Friedman and the monetarist school emphasized: | Introduction to Economics | 1.2 | 7 | 42.9% | 57.1% | 38.1 s |
| US inflation rises sharply and international investors start moving funds into lower-inflation economies. What happens to the supply of dollars in the foreign exchange market? | Global Economy | 4.5 | 3 | 0.0% | 100.0% | 13.2 s |
| US multinational banks scale back plans for new branches in South Africa and keep more investment at home. How does this fall in outward FDI affect the USD supply curve in the foreign exchange market? | Global Economy | 4.5 | 3 | 0.0% | 100.0% | 20.0 s |
| More US engineers work abroad and send a larger share of their income back to US bank accounts. How does this affect USD in the foreign exchange market? | Global Economy | 4.5 | 3 | 0.0% | 100.0% | 9.6 s |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Which of the following is NOT a key sector in the extended circular flow of income model? | Introduction to Economics | 1.1 | 8 | 100.0% | 0.0% | 8.7 s |
| What does sustainability in economics aim to achieve? | Introduction to Economics | 1.1 | 8 | 100.0% | 0.0% | 10.0 s |
| Which of the following is a normative statement? | Introduction to Economics | 1.2 | 7 | 85.7% | 14.3% | 17.6 s |
| Which of the following best describes 'land' as a factor of production? | Introduction to Economics | 1.1 | 7 | 85.7% | 14.3% | 7.0 s |
| What does the concept of opportunity cost refer to? | Introduction to Economics | 1.1 | 5 | 100.0% | 0.0% | 6.8 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| US inflation rises faster than in its main trading partners. What is the likely impact on the price of the dollar in the foreign exchange market? | Global Economy | 4.5 | 3 | 100.0% | 0.0% | 1.5 min |
| What happens to the demand curve when there is an increase in consumer income for a normal good? | Microeconomics | 2.1 | 4 | 25.0% | 75.0% | 1.2 min |
| Asian tech firms cancel planned data centres in the USA. How does this change in inward FDI affect the dollar in the foreign exchange market? | Global Economy | 4.5 | 6 | 50.0% | 50.0% | 1.1 min |
| A slowdown in US construction reduces imports of Chinese steel. What happens to the dollar in the foreign exchange market? | Global Economy | 4.5 | 6 | 50.0% | 50.0% | 45.1 s |
| More Mexican workers in the USA send money home while more US retirees in Mexico send pension income back to the USA. How would you show these remittance flows on the diagram? | Global Economy | 4.5 | 6 | 50.0% | 50.0% | 41.8 s |
5. Conclusion
Next steps
Spend focused time on FX diagram practice (FDI, remittances, inflation), keep short concept checks for introduction topics, and use timed 30–60s diagram drills to reduce hesitation and improve accuracy.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report summarises anonymized, aggregate quiz activity for the week; no individual student data are shown or used.