BIOL2022 L01 Why statistics? Organisms are variable in a variable world.

Descrição

Module 1, Lecture 1 SUMMARY: - Must make questions explicit, and state hypotheses and logical predictions - Correlative approach will tell you that a pattern exists, but (in most cases) only an experiment will tell you why - A simple framework can make life easier!
Michael Jardine
Quiz por Michael Jardine, atualizado more than 1 year ago
Michael Jardine
Criado por Michael Jardine aproximadamente 6 anos atrás
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Resumo de Recurso

Questão 1

Questão
Variability, intrinsic vs extrinsic: Measurement error is an example of [blank_start]____________[blank_end]; ‘natural’ variation within the system (e.g. body sizes of different individuals) are an example of [blank_start]____________[blank_end].
Responda
  • Extrinsic
  • Intrinsic
  • None! Stupid answer.

Questão 2

Questão
Dispersion, spread: [blank_start]____________[blank_end] is the square root of [blank_start]____________[blank_end].
Responda
  • Standard deviation
  • Variance
  • Standard Error

Questão 3

Questão
Complete the following formula:
Responda
  • n (sample size)
  • variance
  • standard deviation
  • standard error

Questão 4

Questão
When to use main tests: Differences between 2 means: [blank_start]____________[blank_end]; Differences between >2 means: [blank_start]____________[blank_end]; Linear and/or curvilinear relationships: [blank_start]____________[blank_end]; Frequencies (counts): [blank_start]____________[blank_end]; (All of these test null hypotheses)
Responda
  • t-test
  • ANOVA
  • Regression and correlation
  • G test and Chi squared
  • Chi squared only
  • Regression only
  • Correlation only
  • G test only

Questão 5

Questão
Correlation vs regression:
Responda
  • Correlation defines a relationship between variables (causal or not)
  • Regression states that one variable predicts another
  • Regression defines a relationship between variables (causal or not)
  • Correlation states that one variable predicts another

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