You are Here: Home >< Maths

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

• View Poll Results: how was it?
amazing
47
4.76%
good
165
16.72%
okay
264
26.75%
217
21.99%
awful
294
29.79%

1. 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

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
7d) 3/16
2. 1. a. a=0.2 b=0.6 c=0.1
b. 0.9
3. p0tatoEs
Am I a farmer Edexcel?
4. For the last question with bettys potatoes should be 6(0.25x0.25x0.5) since there were 6 arrangements of the possible potatoes
5. (Original post by Mario Manalu)
1. a. a=0.2 b=0.6 c=0.1
b. 0.9
agreed
6. for the hisogram one i got 2.5 width and 2.4 height

median 7.5
mean 8.115
7. (Original post by CamoAssassin00)
For the last question with bettys potatoes should be 6(0.25x0.25x0.5) since there were 6 arrangements of the possible potatoes
wouldn't it be 3 choose 2 potatoes, there are six ways to arrange the potatos but surely you have to remove the duplication of the 0.25 potatoes?
8. You man allow post your working out too. Especially for Q7/6/5 those IMO are kinda mad.
9. (Original post by CamoAssassin00)
For the last question with bettys potatoes should be 6(0.25x0.25x0.5) since there were 6 arrangements of the possible potatoes
A friend of mine suggested that as an answer.
10. (Original post by ermalgfffv)
for the hisogram one i got 2.5 width and 2.4 height

median 7.5
mean 8.115
got those 2 m8
11. (Original post by Squiidsquid)
wouldn't it be 3 choose 2 potatoes, there are six ways to arrange the potatos but surely you have to remove the duplication of the 0.25 potatoes?
Nope, one was below q1 one was above q3. Same probability, different potatoes. So it would be 3 permute 3.
12. what did everyone get for the regression line?
13. What was the probability of more than q3? And what was the LQ for last question
14. (Original post by Squiidsquid)
1a) a = 0.2
b = 0.6
c = 0.1
1b) F(7) = 0.9

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

2.
3.
4.
5. -1.89 degrees, something like t = 17.7 - 0.0126h
6.

7a) 0.1151
7b) 0.2215?
7c)123g?
7d) 3/32 ?
i got 8/3 for the height lmao
15. 4. a. 0.1
b. 0.441
16. For question 3 which I believe was a normal distribution did ya'll get 0.44 something
17. (Original post by CamoAssassin00)
For the last question with bettys potatoes should be 6(0.25x0.25x0.5) since there were 6 arrangements of the possible potatoes
agreed
18. Did anyone get 5/21 for the probability of picking green, i did it via 2 methods and got the same answer. But i esentially did 5/84/ (probability of rg, rr, yr) as we know there are 47 red.
19. (Original post by kkkfamyh132)
What was the probability of more than q3? And what was the LQ for last question
I remember 7b was 0.25 plus 0.1151 so was equal to 0.3651 as was probability up to q3- the probability up to 92
20. (Original post by yoyomynameis...)
Did anyone get 5/21 for the probability of picking green, i did it via 2 methods and got the same answer. But i esentially did 5/84/ (probability of rg, rr, yr) as we know there are 47 red.
i thought there were 16 reds?

### Related university courses

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: July 18, 2018
The home of Results and Clearing

### 3,037

people online now

### 1,567,000

students helped last year
Today on TSR

### University open days

1. London Metropolitan University
Sat, 18 Aug '18
2. Edge Hill University
Sat, 18 Aug '18
3. Bournemouth University
Sat, 18 Aug '18
Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE