Midterm 1 Sample Exam: Fall 2024

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Original Exam Instructions

Questions

Question 1: Service Trucks

(a) At least one truck (4 points)

(b) Expected number (6 points)

(d) Comparing standard deviations (3 points + 3 points for explanation)

(e) Describing Y (5 points)

Question 2: Ball Bearings

(a) Least likely interval (4 points)

(b) Standardized scores (9 points)

Question 3: Oversized Pistons

(a) Eight rejected pistons (6 points)

(b) Standardized sample proportion (6 points)

Question 4: Drivers and Accidents

(a) Marginal probability (4 points)

(b) Conditional probability (4 points)

Question 5: Gym Members’ Ages

(a) Between the first quartile and median

(b) Comparing gyms (9 points)

Question 6: Photocopier Lifetimes

(a) Selecting an R summary (3 points)

(b) One photocopier (5 points)

(d) Mean lifetime of 64 photocopiers (6 points)

Question 7: The Sample Range

(a) Zero sample range (6 points)

(b) Bias (6 points)

R Reference Output