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BIOL2022 L05 Testing differences between two means: 1- and 2-tailed t-tests

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Module 1, Lecture 5 By the end of this lecture you should understand: - Carrying out a t-test - One- and two-tailed t-tests
Michael Jardine
Quiz by Michael Jardine, updated more than 1 year ago
Michael Jardine
Created by Michael Jardine about 6 years ago
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Question 1

Question
Logical vs statistical null: x = # of koalas in Trees; y = # of koalas on Floor Hypothesis: [x] > [y] Logical Null Hypothesis: [x] [blank_start]____[blank_end] [y] Statistical Null Hypothesis: [x] [blank_start]____[blank_end] [y]
Answer
  • ≤
  • =
  • <

Question 2

Question
Type I vs Type II errors
Image:
L05 Image 1 (binary/octet-stream)
Answer
  • Type I
  • Type II

Question 3

Question
A t-test compares:
Answer
  • Means
  • Variance
  • Error

Question 4

Question
1-tailed vs 2-tailed t-tests: Which one is directional?
Answer
  • 1-tailed
  • 2-tailed
  • Both
  • Neither
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