cera ess six
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
I thought I understood this topic but I keep making errors with the signs I really dont know how it works



For this question I got part A correct but for part b I get x-16.12/1.60=0.5244
but the mark scheme says x-16.12/1.60=(-0.5244)



Likewise with this question aswell



I get 162-x/9=1.28 but the mark scheme says 162-x/9=(-1.28)
0
reply
Classical Liberal
Badges: 19
Rep:
?
#2
Report 6 years ago
#2
For the first question, I think you are right. You are trying to find the find the region which covers 0.7 from negative infinity to the answer to the question.
0
reply
Hedgeman49
Badges: 14
Rep:
?
#3
Report 6 years ago
#3
(Original post by cera ess six)
I thought I understood this topic but I keep making errors with the signs I really dont know how it works



For this question I got part A correct but for part b I get x-16.12/1.60=0.5244
but the mark scheme says x-16.12/1.60=(-0.5244)



Likewise with this question aswell



I get 162-x/9=1.28 but the mark scheme says 162-x/9=(-1.28)
First question I think you're right.

Second question I think the mark scheme is right. Assuming 162 is mean for a female (?), apply the common sense test... if you solve for x in your equation, you get x = 162-(9*1.28)... does this seem reasonable? I don't think so. Remember that 90% of men are TALLER, so you're looking at lower tail probabilities.

It's always important to do a sanity check with your answers!
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
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

  • Cardiff Metropolitan University
    Undergraduate Open Day - Llandaff Campus Undergraduate
    Sat, 19 Oct '19
  • Coventry University
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19
  • University of Birmingham
    Undergraduate Open Day Undergraduate
    Sat, 19 Oct '19

Why wouldn't you turn to teachers if you were being bullied?

They might tell my parents (19)
7.28%
They might tell the bully (26)
9.96%
I don't think they'd understand (42)
16.09%
It might lead to more bullying (95)
36.4%
There's nothing they could do (79)
30.27%

Watched Threads

View All