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📊AP Statistics
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📊AP Statistics

FRQ 1 – Multi-Focus on Practices 1 and 2
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Unit 1: Exploring One-Variable Data and Collecting Data
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AP Stats FRQ Types & Units

Each FRQ type tests specific skills taught in particular units. Here's why certain units appear for each question type:

FRQFocusUnitsWhy
FRQ 1Multi-Focus on Practices 1 and 21Tests formulating an investigative question and collecting data (sampling, experimental design)
FRQ 2Multi-Focus on Practices 3 and 41, 2, 5Tests analyzing data and interpreting results — graphs, summary statistics, probability, regression output
FRQ 3Inference3, 4One complete inference procedure — a hypothesis test or confidence interval for proportions or means
FRQ 4Multi-Focus on Practices 2, 3, and 4AllCombines content areas across the course, assessing collecting, analyzing, and interpreting together

This mapping reflects College Board's exam structure - each FRQ type tests specific skills that are taught in particular units.

Practice FRQ 1 of 111/11

1. An agricultural research institute is studying methods to improve the yield of heirloom tomatoes. The institute is particularly interested in comparing a new organic pesticide spray to a standard chemical pesticide spray.

A.

The institute initially proposes the following investigative question: "Are organic sprays better for tomatoes?"

Refine this investigative question so that it clearly identifies the population, the explanatory variable, and the response variable of interest.

B.

To understand current farming practices, a researcher at the institute posts a survey on a popular online farming forum, asking farmers to report their primary pesticide type and their average tomato yield.

Identify the sampling method proposed. Explain one potential source of bias with this method and describe how this bias could affect the estimate of the mean tomato yield for all heirloom tomato farmers.

C.

The institute decides to conduct an experiment using n=60n = 60n=60 available greenhouse plots that are currently growing heirloom tomatoes. The researchers randomly assign 30 plots to receive the new organic pesticide spray and 30 plots to receive the standard chemical pesticide spray.

Explain the purpose of randomly assigning the pesticide treatments to the greenhouse plots in this context.

D.

At the end of the growing season, the plots treated with the new organic pesticide spray had a significantly higher mean tomato yield than the plots treated with the standard chemical pesticide spray.

Based on the study design, to what population can these results be appropriately generalized? Can the institute conclude that the new organic pesticide spray caused the increase in tomato yield? Justify your answers.

Timed

00:00

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FRQ Directions
Free Response Question Practice

This practice environment simulates the AP AP Statistics Free Response Questions section. Here are some guidelines:

  • Read each question carefully before responding. Pay attention to command verbs like "identify," "explain," "analyze," or "evaluate."
  • Use the timer to practice time management. You can pause, restart, or hide the timer as needed.
  • Mark for Review if you want to come back to a question later.
  • Your responses are saved automatically as you type. You can also use the drawing tool for questions that require diagrams or graphs.
  • Use the toolbar for formatting options like bold, italic, subscript, and superscript.
  • Navigate between questions using the Previous and Next buttons at the bottom of the screen.

Tip: Answer all parts of each question. Partial credit is often available, so even if you are unsure, provide what you know.