Should Ursula have included a control group in her experiment?

Ursula was curious about how radioactivity affects the crystalline structure of certain minerals, so Ursula set up an experiment using the mineral zircon. First, she exposed samples of the mineral to different amounts of radiation. Then, she examined the samples using special instruments that can detect the crystalline structure of the samples.

Answer 1

I think she already did......

It was made clear that...

#"she exposed samples of the mineral to different amounts"# #"of radiation"#

It seems that she would have obviously conducted a control experiment to establish the baseline, even though the radiation could be on the high end or the low end, i.e. background radiation.

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Answer 2

Olivia Anton

Yes, including a control group in an experiment is essential for comparing the experimental group's outcomes and ensuring that any observed effects can be attributed to the experimental manipulation.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.