Michael Jardine
Quiz por , criado more than 1 year ago

Module 1, Lecture 7 By the end of this lecture you should understand: - Why independence is important - Lack of independence causes pseudoreplication - Lack of independence causes confounding - Independence is the single most important thing you can use to do good experiments (both manipulative and mensurative

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Michael Jardine
Criado por Michael Jardine aproximadamente 6 anos atrás
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BIOL2022 L07 Three cardinal sins: Non-independence, Confounding, Pseudoreplication

Questão 1 de 4

1

Non-independence causes:

Selecione uma ou mais das seguintes:

  • Pseudoreplication

  • Confounding

  • An bloody uprising of the oppressed population to overthrow the proverbial [or literal] shackles of their masters!

Explicação

Questão 2 de 4

1

Pseudoreplication = “The use of inferential statistics to test for treatment effects with data from experiments where either TREATMENTS ARE NOT REPLICATED (though samples may be), or REPLICATES ARE NOT STATISTICALLY INDEPENDENT.”

True or false: An experiment on a sediment core which has been stratified into 5 sub-samples (n=5) avoids pseudoreplication as measurement bias has eliminated.

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 3 de 4

1

Pseudoreplication = “The use of inferential statistics to test for treatment effects with data from experiments where either TREATMENTS ARE NOT REPLICATED (though samples may be), or REPLICATES ARE NOT STATISTICALLY INDEPENDENT.”

True or false: An experiment on a sediment core which has been split into 5 sub-samples falls into pseudoreplication as only one sediment core (n=1) is being used.

Selecione uma das opções:

  • VERDADEIRO
  • FALSO

Explicação

Questão 4 de 4

1

Experiment: A drug trial using mice is investigating whether drug [x] has an effect on heart rate.
A positive effect is found, but this could be because the injection itself causes tachycardia.
This in an example of:

Selecione uma das seguintes:

  • Confounding

  • Pseudoreplication

  • Non-independence

  • None of the above

Explicação

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