I was doing past papers for maths paper 3 and noticed that for hypothesis testing my method is always different when they want you to find if the mean has changed but I still get the answer correct. I know this isn't a fluke either because I've always gotten the correct answer with my method.

In the mark schemes they find the critical value and compare it to the Z-value of the new proposed mean, but i always find the probability of getting the new mean and compare it to the significance level.

Would they give me no method for this or is it ok?

In the mark schemes they find the critical value and compare it to the Z-value of the new proposed mean, but i always find the probability of getting the new mean and compare it to the significance level.

Would they give me no method for this or is it ok?

Yes, any accurate method is acceptable. Your method sounds fine (unless the question particularly specifies the method they want you to use, of course).

Original post by schminke100

Yes, any accurate method is acceptable. Your method sounds fine (unless the question particularly specifies the method they want you to use, of course).

Ah ok thank you 😁

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can someone please explain what principle domain is and why the answer is a not c?Maths

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