Review practice
Choose a section to work through its questions and solutions. Your progress is shared across pages. Ranges follow collection order; original source labels are kept on each question.
Section 1 · Questions 1–6
Compare two runners and distinguish a sum from a multiple · Scale fruit masses before combining independent prices · +4 more
- Question 1 · Compare two runners and distinguish a sum from a multiple
- Question 2 · Scale fruit masses before combining independent prices
- Question 3 · Use the given variances and the central eighty percent
- Question 4 · Keep both tails of a call-duration difference and all handling fees
- Question 5 · Keep a strict probability condition strict at the quantile boundary
- Question 6 · Condition on the total length before interpreting two short pickles
Section 2 · Questions 7–12
Find a central height interval and a large-sample tail limit · Recover a component normal distribution from a sum of two observations · +4 more
- Question 7 · Find a central height interval and a large-sample tail limit
- Question 8 · Recover a component normal distribution from a sum of two observations
- Question 9 · Keep the instructed rounded model consistent with later probabilities
- Question 10 · Interpret a probability inequality as a range of mass thresholds
- Question 11 · Square the coefficient of a two-packet total and retain both tails
- Question 12 · Maximise a normal interval probability by choosing its mean