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# Statistics GCSE 2016 watch

1. (Original post by EverythingGreen)
I think it's likely they are going to ask about;
Normal Distribution
Time series (including moving averages)
Spearman's Rank
Histograms
Interpreting data
Maybe Binomial Distribution!
I agree !! Also sampling methods
2. What is quota sampling ?!
3. (Original post by nisha.sri)
I agree !! Also sampling methods
Definitely!
4. (Original post by EverythingGreen)
Definitely!
What is quota sampling ?
5. (Original post by himmat)
has anybody got any predictions on what might come in the 2016 statistics gcse paper?
Good luck everybody for tommorow hoping for the best!
does anyone know how to do index numbers
6. (Original post by nisha.sri)
Same here, I've reviewed all the past papers, reviewed all the topics and now i'm like what do i do. Yeh i agree How are you revising ?

How are you revising ?
Past papers
7. (Original post by EverythingGreen)
Past papers
Same !! How many have you done ?
8. (Original post by nisha.sri)
What is quota sampling ?
a non-random sampling technique that divides the population into subgroups and the same amount of people are taken out for example 100 females and 100 males
9. (Original post by nisha.sri)
What is quota sampling ?
Quota sampling is when you take pre-specified numbers of the population with certain characteristics (e.g sex, age)

An example would be like choosing 20 boys and 20 girls to do a questionnaire
10. (Original post by nisha.sri)
Same !! How many have you done ?
do you know how to do index numbers
11. (Original post by nisha.sri)
Same !! How many have you done ?
I've done like 3-4 now lol
12. (Original post by nisha.sri)
QUICK QUESTION !!
You know for the trend line and the seasonal moving averages. You know the question ( usually the last part ) it says estimate the .... for 2008 quarter 2. Use your answer to part (d). How do you know whether to add it or take it away ?!
Also another question - when drawing the line of best fit do you draw it through the mean ?
if its all the other 2nd quarters are above the line add it, they normally are above
13. (Original post by hkirkpatrick)
do you know how to do index numbers
Yep The formula I use isquantity / quantity in base year times 100.
14. (Original post by EverythingGreen)
I've done like 3-4 now lol
My teacher has given us all of the past papers so i'm done with all that

(Original post by hkirkpatrick)
if its all the other 2nd quarters are above the line add it, they normally are above
Oh ok thank you
15. (Original post by nisha.sri)
Yep The formula I use isquantity / quantity in base year times 100.
thank you and what about chain base?
16. (Original post by hkirkpatrick)
do you know how to do index numbers
Simple Index numbers: (current price/base year price) x100

Chain base index number: (current price/ previous year's price) x100

Weighted index numbers: sum of (index no. X weights)/ sum of weights
17. (Original post by EverythingGreen)
Simple Index numbers: (current price/base year price) x100

Chain base index number: (current price/ previous year's price) x100

Weighted index numbers: sum of (index no. X weights)/ sum of weights
I've never seen a question about Weighted index numbers.
18. (Original post by nisha.sri)
I've never seen a question about Weighted index numbers.
Neither have I but it's in the spec so better to be safe than sorry 😜
19. (Original post by EverythingGreen)
Neither have I but it's in the spec so better to be safe than sorry 😜
True !!
20. (Original post by hkirkpatrick)
thank you and what about chain base?
Current price / the previous years price times by 100.
Chain base index number tells you the annual precentage change.

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