Thanks for pointing this out!

I've updated the H1 Maths solutions to version 1.3 to change the second part of Q10 to utilize a one-tail test at the lower tail instead of the upper tail (due to me misreading the question earlier - getting a bit tired now after doing 3 A-Level Maths papers *sigh*).

]]>I believe you are referring to Q5(i)? As I've mentioned here, Don't worry about the additional table & workings ðŸ˜‰

]]>As the equation in Q1 has *two real and distinct* roots, its discriminant must be > 0 (cannot have equal sign). As this is a 3-mark question, you'll probably get penalized a mark or two for this.

For Q5(i), the question only requires you to find the coordinates of the stationary points. In a 4-mark H1 maths question like this, I believe that you should be ok as long as you've demonstrated clearly in your workings how you've differentiated the function and obtained the coordinates of the stationary points. So don't worry about the max/min point determination in the workings (which are left there for our own checking and completeness only :P)

Q5(iii) and the σ^{2} issues have been corrected in the latest version of the solutions ðŸ˜€ Thanks!

- 5(iii): Answers are now in 2 d.p. ðŸ˜›
- 11(a): Reduced the data points down to 8 as required by the question (sorry I missed this part and ended up machine-gunning the scatter plot :P)
- 12(iv): Changed the final answer to σ
^{2}as question asks for variance.

More later ...

]]>and for 11, they want 8 pairs of data points.

]]>And for question 5i right, i found the coordinates of the stationary points but didnt put down whether it is max or not how many marks will i be penalised?

And like for those answers that i left it has a fraction like 1491/160 without putting it as a number and a fraction will i be penalised?

Question 5iii right, wants it in 2dp so your second coordinate is wrong! and then right for question 12 iv they want the variance of the distribution so it should be sigma squared right?

]]>