Quantitative problem solving and data
| English | 中文 | Pinyin |
|---|---|---|
| numerical entry/njuːˈmerɪkl ˈentri/ | 数值填答 | shù zhí tián dá |
| conditional probability/kənˈdɪʃənl ˌprɒbəˈbɪlɪti/ | 条件概率 | tiáo jiàn gài lǜ |
A decision before an answer
- The mean of a data set can stay fixed while its spread changes. Which statistic is the question actually asking for?
- Your goal: Solve algebraic, geometric and data-analysis problems.
Read the relationship
- GRE General quantitative content includes arithmetic, algebra, geometry and data analysis; calculus is not required.
- Select all valid options where requested.
Five values have sum 35. Their mean is:
Divide sum 35 by count 5.
Use the defining rule
- Read whether a problem asks for one answer, all answers or numerical entry. Check units and form before submitting.
- Enter numerical answers in the required form and use the on-screen calculator appropriately.
Three of four red and one of six blue counters are marked. P(red given marked)?
Of the four marked counters, three are red.
Check the conditions
- For data interpretation, identify the denominator and whether a percentage is conditional on a subgroup.
- Enter numerical answers in the required form and use the on-screen calculator appropriately.
A class has 12 morning and 8 afternoon students. Of them, 3 morning and 4 afternoon students cycle. P(cycles)=7/20. P(afternoon given cycles)=4/7. The second denominator includes only cyclists.
If 2x+7=19, x = ____.
Subtract 7 and divide by 2.
Apply the task format
- The on-screen calculator is available for General quantitative sections. Estimate first to catch an entry error.
- Enter numerical answers in the required form and use the on-screen calculator appropriately.
Do not assume a geometric diagram is to scale or replace a conditional denominator with the whole population.
Which answer fits this case?
Solve algebraic, geometric and data-analysis problems
The GRE General quantitative test requires multivariable calculus.
Undergraduate calculus belongs to GRE Mathematics, a different test.
Keep the distinctions
- conditional probability 条件概率 — Probability within a specified condition.
- numerical entry 数值填答 — An answer entered as a number rather than an option.
- Solve algebraic, geometric and data-analysis problems.
- Select all valid options where requested.
- Enter numerical answers in the required form and use the on-screen calculator appropriately.
Match each term with its precise meaning in this lesson.
Keep the distinctions stated in the teaching example.
Put this lesson’s reasoning or event sequence in order.
The order follows the stated process; check each stage before the next.