Edexcel AS Mathematics: Statistics S1- 13 June 2018: Unofficial Mark Scheme.

IIRC,

for regular maths: 480UMS overall, 180UMS in C3/4
for further maths: 480 UMS overall, 360UMS in A2 modules

How did you do the last part of the spinner q when y>x lol this one sloshed my brain

IIRC,

for regular maths: 480UMS overall, 180UMS in C3/4
for further maths: 480 UMS overall, 360UMS in A2 modules

1a) a = 0.2
b = 0.6
c = 0.1
1b) F(7) = 0.9

spinner:
a = 0.1
b = 0.35
E(Y) = 4
Var(Y) = 63.9?
P(Y>X) = 0.55

histogram question:
2.5 width and 2.4 height
median 7.46
mean 8.115
skew: 0.5

bead question:
P(bead = green) = 1/32
P(two reds given one is red) = 5/37

4.a) P(µ < X < 17) = 0.1
b. 0.441

regression:
t = 17.7 - 0.0126h
17.7 degrees at sea level
change: -1.89 degrees

7a) P(B < 92) = 11.51%
7b) P(B>Q3) = 0.2215
7c) Q1 = 123g? or 113g?
7d) 3/16

I got Q1=123.2

Does anyone remember how many marks each question was ?

Yup me too, 123.2

What was the question ??? I don’t remember writing a number like that before

E(X) = 2

Y=10-3X

so find E(Y): E(10-3X) ---> -3E(X)+10 ---> -3*2 +10 = 4

so E(Y) was 4.

someone can confirm if needed

Hmm, I honestly didn’t even check my working because I thought they matched too well to be wrong lmao. But if some people did get big fractions then I coulda lost a couple of marks

I think I got a = 0.1 and b = 0.35

What about the paper? Can teachers or schools get the paper and get the answers in the next few days?

How did you do the last part of the spinner q when y>x lol this one sloshed my brain