S1 question please help Watch

bOwLiNg_FoR_sOuP
Badges: 0
Rep:
?
#1
Report Thread starter 12 years ago
#1
http://www.mathsnet.net/asa2/2004/s15exam7.html
Can somebody help me with part c to this question please
Exam tomorrow!!!
Not sure how to do it
0
reply
Dimez
Badges: 2
Rep:
?
#2
Report 12 years ago
#2
If you scroll down, there's an option that enables you to see the full solution.
0
reply
bOwLiNg_FoR_sOuP
Badges: 0
Rep:
?
#3
Report Thread starter 12 years ago
#3
Yeah I know that lol i'm not that stupid I just dont know how they did it
0
reply
bigbadb1319
Badges: 0
Rep:
?
#4
Report 12 years ago
#4
how did u do part a?
0
reply
Dimez
Badges: 2
Rep:
?
#5
Report 12 years ago
#5
To calculate the new mean for part (c), simply multiply E(X) by 8 and add 8.

For the new variance, mulitply Var(X) by 8^2. You ignore the ' + 8 ' since the variance needn't be affected by additional values.
0
reply
bOwLiNg_FoR_sOuP
Badges: 0
Rep:
?
#6
Report Thread starter 12 years ago
#6
for part a you just see how much each has been added each time and rewrite
thanks guys for your help
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Cranfield University
    Cranfield Forensic MSc Programme Open Day Postgraduate
    Thu, 25 Apr '19
  • University of the Arts London
    Open day: MA Footwear and MA Fashion Artefact Postgraduate
    Thu, 25 Apr '19
  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 27 Apr '19

Have you registered to vote?

Yes! (207)
40.19%
No - but I will (31)
6.02%
No - I don't want to (35)
6.8%
No - I can't vote (<18, not in UK, etc) (242)
46.99%

Watched Threads

View All