2017 Ap Statistics Free Response Answers Question 6

The Great Pinewood Derby of 2017: Or, How AP Stats Question 6 Became a Real-Life Drama

Let’s be honest: when most people hear “AP Statistics,” their brain conjures images of a distant, beige classroom where time moves slower than a snail on sedatives. But the 2017 Free Response Question 6? That one was different. It was about a kid, his dad, and a Pinewood Derby car—the kind where tiny wooden racers zoom down a ramp, powered by gravity and pure childhood hope. If you’ve ever struggled to assemble Ikea furniture without yelling, you’ll get this question.

The problem centered on a father who built a car for his son, but—plot twist—the car kept crashing. The dad, a well-meaning but slightly frantic engineer type, decided to test different wheel styles. You know the feeling: you change the wheels on your suitcase because one is wobbly, only to discover you now have a three-wheeled disaster. That’s the energy here.

According to the official AP answer, the dad should have used a matched pairs design instead of a completely randomized one. Translation? Instead of randomly assigning wheels to cars like a lottery, he should have tested each wheel type on the same car. It’s like trying two different brands of running shoes—you don’t wear one brand on your left foot and another on your right, unless you want to look like a clown and run in circles.

Why This Question Made Everyone Smile

Because it’s relatable. We’ve all been that dad: you buy a new gadget, ignore the manual, and blame the gadget when it fails. The question forced students to think: “If I change the wheels, is the car faster, or did I just get lucky with the ramp slope?” Classic confounding variable. It’s the same reason your GPS gives you a different route every time—you blame the device, but really, you just forgot to set “avoid highways.”

The official scoring rubric emphasized that the dad needed to control for car-to-car variation. In everyday life, this is like comparing two pizzas from the same restaurant. If you order pepperoni from one location and Hawaiian from another, you’re not really comparing pizzas—you’re comparing traffic, ovens, and the mood of the chef. Context matters, people.

Another key point: the dad should have repeated trials. Not just one race per wheel type, but several. Imagine if you judged a whole basketball season based on one free throw. That’s how bad science happens. The answer basically said, “Run the race multiple times and average the results.” That’s how we learn that your “lucky socks” don’t actually make you jump higher—they just make your feet smell.

2017 AP Statistics Free Response #2 - YouTube

The Anecdote That Lived Rent-Free in My Head

I once helped my nephew build a Pinewood Derby car. We spent three hours sanding the axles to a mirror shine. On race day, the car flew off the track and hit a judge in the shin. The kid cried. The judge was fine. But the underlying issue? We ignored the weights. According to the 2017 question, that’s like forgetting to account for the mass of the car—a blatant violation of experimental design. We needed a control car, a balance, and probably a therapist.

The official answer for Question 6 also pointed out that the dad should have used a random assignment of wheel type to cars, but only after blocking by car body manufacturer. Yes, “blocking” sounds like a protest, but in stats, it means grouping similar things together. It’s why you don’t compare your grandma’s meatloaf with a frozen pizza—you block by “homemade” and “store-bought.” You get it.

The Real Lesson: Stats Is Just Fancy Common Sense

When you read the 2017 Free Response Answers, the best part is how obvious it all seems afterward. That’s the magic of statistics: it’s the art of not fooling yourself. The dad in the problem wasn’t dumb—he was just excited. And excitement makes us skip steps. We’ve all been there. You buy a new phone case because it’s “scientifically proven” to protect against drops. Then you drop your phone, and the case cracks but the phone survives. Was it the case? Or did you just drop it on carpet? You’ll never know. That’s the dad’s dilemma.

2017 AP Statistics Free Response #1 - YouTube

The final takeaway from Question 6? Design your experiments before you care about the outcome. Whether it’s building a Pinewood Derby car, choosing a diet, or trying to fix your Wi-Fi by unplugging the router—good statistics is about asking the right questions. And sometimes, the right question is, “Can I just buy a new car instead?” No. The answer is always no. But at least now you know how to prove it.

So here’s to the 2017 AP Stats Question 6. It taught us that consistency beats randomness, that repeating a race is better than hoping, and that every dad is just a statistician in disguise. If you aced that question, you probably understand why your mom’s spaghetti recipe “never works” when you try it—you changed the pot, the water, and the altitude. Classic confounding factor.

Now go forth, block your variables, randomize your trials, and maybe—just maybe—your Pinewood Derby car will stay on the track. And if it doesn’t? At least you’ll have the data to explain why.