Planning a Practical Investigation - Biology

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rbennison
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Joined: Sat Jul 04, 2015 7:16 pm

Planning a Practical Investigation - Biology

Post by rbennison »

Hi, can anyone help??

I am stuck with the results part and working out whether I should use nominal, ordinal etc data and which statistical test I should use..?

I think it should be ordinal because I am measuring the heart rate getting slower or faster.. and I believe I should use the Spearmans test but I can't really explain why...??

Thanks for any help!

Rachael

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carrotcruncher
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Joined: Thu Oct 08, 2015 9:32 am

Re: Planning a Practical Investigation - Biology

Post by carrotcruncher »

Pulse rate is interval data.
If you look near the bottom of page 10 on the carrying out criteria sheet - you may find a slight clue about the test to use ..... :D

rbennison
Posts: 2
Joined: Sat Jul 04, 2015 7:16 pm

Re: Planning a Practical Investigation - Biology

Post by rbennison »

Hi,

Thank you for clearing that up for me, and when explaining that I am using interval data I would say because the two adjacent units of measurement is the same but the zero point is random?

I am be being stupid but I'm not sure where to find the criteria sheet is it the TAQ sheet?

thanks for your help.

Rachael

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carrotcruncher
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Joined: Thu Oct 08, 2015 9:32 am

Re: Planning a Practical Investigation - Biology

Post by carrotcruncher »

Interval data is data in which we know not only the order, but also the exact differences between the values.
In this case it is time - the increments are known, consistent, and measurable.

And yes read through the TAQ sheet for carrying out...

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