Edexcel s1 June 2016 unofficial mark scheme

cool story bro, you'll get used to it.

what brutality

Ok, I managed to get all my answers stored in my calculator at the end, this is what I got. Not 100% sure on all of them, but we can compare.

Question 1Question 2Question 3Question 4Question 5Question 6

love u b xx

Ok, I managed to get all my answers stored in my calculator at the end, this is what I got. Not 100% sure on all of them, but we can compare.

Question 1Question 2Question 3Question 4Question 5Question 6

lol

Can someone tell how many marks I'll lose for the overall question if my P and Q were wrong, cause my working for the rest of q was all right, just used the wrong numbers

it wasnt a joke u, im serious xxxx

Mean slightly decreases. It adds one to the frequency of the 3-3.5 class and if you actually did the calculation, its shown to decrease. This is because the effect of 3.43 goes onto the midpoint of the class, 3.25 which is less than the mean. Amend

please can you tell me how you worked out Q2 f i and ii ? like the general ideas of going about it ? thank you

Mean slightly decreases. It adds one to the frequency of the 3-3.5 class and if you actually did the calculation, its shown to decrease. This is because the effect of 3.43 goes onto the midpoint of the class, 3.25 which is less than the mean. Amend

Hey guys
Was told to post my answers on a separate thread so it doesn't get lost in the other thread.
I've got my answers here:

Predicting 58 ish is an A and not much lower because it wasn't that bad of a paper. Loads of people thought it was OK or slightly harder. Theory questions threw me off a bit though.

Q1. 11 total i think
a) was Sdd or something (3)
b) wiggles is the response variable as it changes depending distance (1)
c) r = 0.722 + 0.014d
d) d= 350 sub in so w = 5.6 ish?
Q2 Sarah one
a) equation is 2p + q = 0.5
b) a= 0.175 b= 0.15
c) idk
d) E(R) = 0.45?
e) Sarah wins = 0.475 Rebeccawins= 0.375

Q3 with frequencies?
a) heigh of bar and width igot something like 34cm and 1cm?
b) show that Syy is … (1) didn’tdo this right lol
c) PMCC
d) SD
e) What were the other questions?

Q4 Hotel one
a) 0
b) t =0.03
c) u = 0.22
d) 0.45 and 15/37
e) diners 16? Some people say 33

Q5
a) median 3.47
b) SD = 0.689?
c) mean proof 3.43
d) Probability baby wasunder 3kg something like 0.2546
e) explain the use ofthe model? (2)I said that althoughthe range chosen was appropriate as mean was 3.43 for both and SD was close tothe calculated one, there is negative skew as median>mean so not good to use this model as mean and SD are affected by skew.
f) effect of adding baby weight of 3.43 on (3)
i) mean – I said staysthe same because I sneakily calculated it , because the frequency becomes 51and value is within range or something
ii) SD change "Others said it stayed thesame, but I wrote that it decreases, because now the average distance from themean is slightly less (as n has increased by 1 but deviance hasn't changed)".

Q6.
a) 0.0668 men took over 300 min to run
b) needs to run below 206.33 minutes to be in 20% of people who finish first
c)
d) the mew one0.18/0.5 = 0.36 (3)

Let me know what I'm missing and I've done wrong as well as the marks for each if you remember

I have the mean decreasing as it would be calculated using 3.25 as the midpoint of the class which is obviously less than 3.43. I really struggled with that SD part after it though, but I put something similar to yourself I think.

Ok, I managed to get all my answers stored in my calculator at the end, this is what I got. Not 100% sure on all of them, but we can compare.

Question 1Question 2Question 3Question 4Question 5Question 6

How much was the histogram question on height and width worth? and the same with 4)dii and e.