04-BS-2
Worked solutions to 14 past sittings (2013–2019), 112 questions. Pick a sitting, or start from a topic below.
- December 2019
- December 2018
- May 2018
- December 2017
- May 2017
- December 2016
- May 2016
- December 2015
- May 2015
- December 2014
- May 2014
- December 2013
- May 2013
- Undated paper
Topics across the sittings
Topics that come up in more than one sitting, taken from the headings of our worked solutions. A topic counts once per sitting.
- Correlation (6 sittings): December 2018 Q8 · December 2015 Q8 · December 2014 Q8 · May 2014 Q8 · May 2013 Q8 · Undated paper Q8
- Simple Linear Regression (5 sittings): December 2018 Q8 · December 2015 Q8 · December 2014 Q8 · May 2013 Q8 · Undated paper Q8
- Binomial (4 sittings): December 2015 Q2 · December 2013 Q3 · May 2013 Q2 · Undated paper Q2
- Confidence Intervals (4 sittings): December 2018 Q5 · December 2015 Q5 · December 2014 Q5 · December 2013 Q5
- Normal Distribution (4 sittings): December 2015 Q1 · December 2014 Q1 · May 2014 Q1 · May 2013 Q1
- Two-Sample Tests (4 sittings): December 2018 Q7 · December 2015 Q7 · May 2014 Q7 · May 2013 Q7
- Estimation (3 sittings): May 2014 Q5 · May 2013 Q5 · Undated paper Q5
- Hypothesis Testing (3 sittings): May 2014 Q5 · May 2013 Q5 · Undated paper Q5
- Large-Sample Tests (3 sittings): December 2015 Q6 · May 2013 Q6 · Undated paper Q6
- Poisson Approximations (3 sittings): December 2015 Q2 · May 2013 Q2 · Undated paper Q2
- Brinell Hardness (2 sittings): December 2018 Q5 · December 2014 Q5
- Continuous Random Variable (2 sittings): December 2014 Q4 · May 2013 Q4
- Custom pdf (2 sittings): December 2014 Q4 · May 2013 Q4
- Hypergeometric Distributions (2 sittings): December 2015 Q3 · May 2013 Q3
- Hypergeometric Sampling (2 sittings): December 2018 Q2 · December 2013 Q3
Questions by sitting
December 2019
- Question 1: Snow Tire Life (Normal Distribution and Sampling)
- Question 2: City Subway Survey and Rare-Event Approximations
- Question 3: Bus Maintenance (Poisson) and a Hardware Shipment (Hypergeometric)
- Question 4: A Uniform Probability Density Function
- Question 5: Heat-Producing Capacity of Anthracite (Estimation and Testing)
- Question 6: Drill/Driver Kit Lifetime and a Recycling Satisfaction Survey
- Question 7: Shear Modulus of Steel — Two-Sample Comparison
- Question 8: Electric Consumption vs. Residence Area (Correlation and Regression)
December 2018
- Question 1: Normal Distribution of Bag Weight
- Question 2: Binomial/Normal-Approximation Survey and Hypergeometric Sampling
- Question 3: Poisson Process — Telephone Calls
- Question 4: Custom Probability Density Function
- Question 5: Confidence Intervals and Hypothesis Tests — Brinell Hardness
- Question 6: Chi-Square Test of Homogeneity — Four Assembly Lines
- Question 7: Two-Sample Tests — Switch Activation Time
- Question 8: Correlation and Simple Linear Regression — Study Hours vs. Marks
May 2018
December 2017
May 2017
December 2016
May 2016
December 2015
- Question 1: Tire Life — Normal Distribution
- Question 2: Binomial and Poisson Approximations
- Question 3: Poisson and Hypergeometric Distributions
- Question 4: Continuous Probability Density Function
- Question 5: Confidence Intervals and Hypothesis Tests on Young's Modulus
- Question 6: Large-Sample Tests — Mean, Variance, and Proportion
- Question 7: Two-Sample Tests — Comparing Two Processes
- Question 8: Correlation and Simple Linear Regression
May 2015
December 2014
- Question 1: Normal Distribution — Cement Block Weight
- Question 2: Poisson Process — Road Cracks
- Question 3: Hypergeometric and Binomial Distributions
- Question 4: Continuous Random Variable — Custom pdf
- Question 5: Confidence Intervals and Hypothesis Tests — Brinell Hardness
- Question 6: Two-Proportion Test and Contingency Table χ² Test
- Question 7: F-Test for Variances, Then Two-Sample t-Test
- Question 8: Correlation and Simple Linear Regression
May 2014
- Question 1: Normal Distribution — Fabric Softener Volume
- Question 2: Poisson Storms & Hypergeometric Cameras
- Question 3: Binomial Safety Glasses & Committee Decision
- Question 4: Warehouse Order-Fulfilment Tree Diagram
- Question 5: Carburetor Modification — Estimation & Hypothesis Testing
- Question 6: Airline Luggage & Municipal-Services Survey
- Question 7: Insulating-Material Breakdown Voltage — Two-Sample Tests
- Question 8: Study Hours vs. Exam Mark — Correlation & Regression
December 2013
- Question 1: Sampling Distributions of a Normal Component Lifetime
- Question 2: Poisson Calls at an Internet Service Provider
- Question 3: Binomial and Hypergeometric Sampling
- Question 4: Tree Diagram and Bayes' Theorem for Customer Satisfaction
- Question 5: Confidence Intervals and Hypothesis Tests on Bicarbonate Content
- Question 6: Large-Sample Proportion and Mean — Test and Sample-Size Planning
- Question 7: Two-Sample F-Test and t-Test for Drill Lifetimes
- Question 8: Chi-Square Test of Homogeneity Across Assembly Lines
May 2013
- Question 1: Normal Distribution — Parcel Weight
- Question 2: Binomial, Normal and Poisson Approximations
- Question 3: Poisson and Hypergeometric Distributions
- Question 4: Continuous Random Variable — Custom pdf
- Question 5: Estimation and Hypothesis Testing — Young's Modulus
- Question 6: Large-Sample Tests — Tile Weight and Road Satisfaction
- Question 7: Two-Sample Tests — Comparing Light Bulb Makes
- Question 8: Correlation and Simple Linear Regression — Gas Consumption
Undated paper
- Question 1: Normal Distribution of Parcel Weight
- Question 2: Binomial, Normal and Poisson Approximations
- Question 3: Poisson Traffic Jams and Hypergeometric Snow-blowers
- Question 4: Probability Distribution of Random-Guess Score
- Question 5: Estimation and Hypothesis Testing — Young's Modulus
- Question 6: Large-Sample Tests — Tire Weight and Water-Quality Proportion
- Question 7: Two-Sample F-test and t-test — Brick Compressive Strength
- Question 8: Correlation and Simple Linear Regression — Advertising vs. Sales