• We need your support!

    We are currently struggling to cover the operational costs of Xtremepapers, as a result we might have to shut this website down. Please donate if we have helped you and help make a difference in other students' lives!
    Click here to Donate Now (View Announcement)

How did STATISTICS 1 go?

What do you think?


  • Total voters
    98
  • Poll closed .
Messages
188
Reaction score
204
Points
53
I wanted to ask for the histogram myself. I used 9.95, 10.45 and so on. Q4 in this paper is a similar one and exact 20, 30 are used according to the mark scheme. Both are correct perhaps.
It's hard to see that when it is computerized. I believe we are right! If not, it's one mark maximum, but we're probably right. I remember reading it in my textbook like 10 minutes before the exam and my maths teacher said:
"Yes. Just make sure the difference is only very slight."
 
Messages
930
Reaction score
2,173
Points
253
It's hard to see that when it is computerized. I believe we are right! If not, it's one mark maximum, but we're probably right. I remember reading it in my textbook like 10 minutes before the exam and my maths teacher said:
"Yes. Just make sure the difference is only very slight."
I also didn't drew less than 10.0 for a zero. Started with 10-10.5. Not sure if a mark will be deducted for that too.
 
Messages
144
Reaction score
107
Points
53
Q1 [4 marks]

(iii) 200 samples are taken. Find the probability between 163 and 173 inclusive
np=160 npq=32
Less than 173.5: 0.9915
Less than 162.5: 0.6707
Between them= 0.321
Ans: (i) 0.653 (ii) 0.561 (iii) 0.321

Feel free to post any queries or mistakes :)

Last Question, Last Part :
The required probability was P( 163 <= X <= 173)
So in other manner it can be written as P(X < = 173) - P( X< = 163) [just visualize the normal graph]
by applying continuity correction we will get P( X < = 173.5) - P( X <= 163.5) as <= 173 can be written as <174 and <= 163 can be written as <164
 
Messages
930
Reaction score
2,173
Points
253
Last Question, Last Part :
The required probability was P( 163 <= X <= 173)
So in other manner it can be written as P(X < = 173) - P( X< = 163) [just visualize the normal graph]
by applying continuity correction we will get P( X < = 173.5) - P( X <= 163.5) as <= 173 can be written as <174 and <= 163 can be written as <164
Have a look at the last question, last part of this paper.
 
Messages
943
Reaction score
805
Points
103
I also didn't drew less than 10.0 for a zero. Started with 10-10.5. Not sure if a mark will be deducted for that too.
no thats okay. you wont loose a mark dude.
Well I am getting 42 max in S1, 67 max in P1, 58 max in P3 and 40 max in M1.
So overall not an A* and maybe not even an A. You're better off than me man! :( :(
 
Messages
930
Reaction score
2,173
Points
253
no thats okay. you wont loose a mark dude.
Well I am getting 42 max in S1, 67 max in P1, 58 max in P3 and 40 max in M1.
So overall not an A* and maybe not even an A. You're better off than me man! :( :(
Hey! The boundaries for A* have gone as low 205 or even less if I'm not mistaken and this year P1 was hard and P3 and M1 were harder from what I've heard. So you surely have a chance!
I still have to give P3 and M1 next year and even if I get 115 this year next year I'll need around 110 total for an A* and P3 is really hard.
 
Messages
943
Reaction score
805
Points
103
Hey! The boundaries for A* have gone as low 205 or even less if I'm not mistaken and this year P1 was hard and P3 and M1 were harder from what I've heard. So you surely have a chance!
I still have to give P3 and M1 next year and even if I get 115 this year next year I'll need around 110 total for an A* and P3 is really hard.
A* has jumped upto 223 as well, so who knows? I'd want to commit suicide if I get a B. I cant handle it.
Good luck for P3 nd M1 next year
 
Messages
188
Reaction score
204
Points
53
What else did you get wrong?
I made the silliest mistake on the permutations question for 5p2. I multiplied it by 5 instead of 3 (so many 5s made me write it even though I knew I had to multiply by 3, didn't even notice). Also taking off marks which I have not identified as error,s, you know, we all have those small mistakes we think are correct and are only worth 1 mark, such as rounding to wrong amount of s.f.'s, so I'm deducting marks off myself to get in the worst case. If that makes any sense lol.
 
Top