# Standard Errors???

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Thread starter 4 years ago
#1
The mark scheme says - "significantly different because standard errors don't overlap" i dont get how that is true because the error bars for 25 and 30 degrees are the same. And what does "significantly different" even mean?? thanks
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4 years ago
#2
Yes, and is 25 a "high" temperature in the context of the question? No, so what does it matter what the error bars for 25 are?

For 30 they are quite different, I don't see how you can say they are the same?

Significant in statistics means "not by chance".
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Thread starter 4 years ago
#3
(Original post by yudothis)
Yes, and is 25 a "high" temperature in the context of the question? No, so what does it matter what the error bars for 25 are?

For 30 they are quite different, I don't see how you can say they are the same?

Significant in statistics means "not by chance".
them 3 error bars are the exact same is what i mean, or are we looking at each temperature independently? and okay i get you about not due to chance. But the whole significantly different is confusing me. If i wrote error bars dont overlap therfore results arent due to chance would i get the marks? because in the mark scheme "significant" is underlined. Thank you though!
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4 years ago
#4
Well, what are you comparing here? Producing GB and not producing GB. And at 35 you have a clear difference.

The error bars represent a certain confidence interval (often 95% or 99%). So if they don't overlap it means that statistically, they are different at the, say, 95% confidence level. That means it is statistically significant.
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