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Inferential testing (A-level only)

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Question 38

Sensory Evaluation of Craft Beers

In a quality control study for a local brewery, a food scientist wanted to compare the perceived bitterness of two new IPA recipes:

  • Brew Alpha used a traditional dry-hopping method.
  • Brew Beta used a modern cryo-hopping method.

The scientist recruited a panel of 15 professional tasters. Each taster sampled both Brew Alpha and Brew Beta in a randomized order and rated the bitterness of each on a scale from 1 to 10 (where 1 = extremely mild and 10 = extremely bitter).

To determine if there was a significant difference in the bitterness ratings between Brew Alpha and Brew Beta, the scientist proposed using an independent (unrelated) two-sample ttt-test to analyze the data.

Suggest a more appropriate statistical test for the scientist to use with this data. Explain two reasons for your choice based on the description of the study.

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Inferential testing (A-level only) Questions

  1. A Level
  2. /Psychology
  3. /Inferential testing (A-level only)

Practise AQA A Level Psychology Inferential testing (A-level only) with exam-style questions for A Level Psychology. 123 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.

Question bank