Hi! Because we're told in the question that we're looking at 'ten collie dogs' so in that case our sample size is 10 giving us n = 10 I hope that makes it a little clearer but do let me know if you're still unsure :)
Hi, no worries, so in total we have 80 values (Sum of the frequency row) now try to think of this as a cumulative sum, in other words the first 5 values lie between 20-29, so for example the 12th value would lie somewhere between 30-39 range as we have another 10 values in 30-39, in total we're now up to 15 values, in that case the 20th value would then lie in 40-49 as the 20th value definitely occurs at some point in this interval. (I hope this helps but just let me know if it doesn't and i'll try find a better way to explain it!)
This link should word but if not just simply gooing Edexcel Past Papers will take you on the right path, the 2019 and 2020 papers are currently locked by edexcel as some teachers are apparently using them as part of assessments to determine grades
your videos are lifesavers thank you for this😊
was wondering at 5:51 why does n=10?
Hi!
Because we're told in the question that we're looking at 'ten collie dogs' so in that case our sample size is 10 giving us n = 10
I hope that makes it a little clearer but do let me know if you're still unsure :)
I understood the video very well and the eplanation was simple. Just 1 thing, for evey answer, do we have to round up to 3 sf?
it souldn't matter but if it does it will probably say in the question, check the front of the paper it should say there anyway
this guys a life saver
Hi, just wondering why did you multiply the 80 by 4 15:18 ? Are you not working out the mean?
working out the lower quartile which is 1/4 of the way into the data so divide by 4
Hi at 16:56 I don't really get how you decided that the 20th value lies in the 40-49 range .. pls help
Thank you
Hi, no worries, so in total we have 80 values (Sum of the frequency row) now try to think of this as a cumulative sum, in other words the first 5 values lie between 20-29, so for example the 12th value would lie somewhere between 30-39 range as we have another 10 values in 30-39, in total we're now up to 15 values, in that case the 20th value would then lie in 40-49 as the 20th value definitely occurs at some point in this interval. (I hope this helps but just let me know if it doesn't and i'll try find a better way to explain it!)
@@AJMaths thank you so much! It helped
that helped so much thank you
Thank you for the kind words!
We have a new exam revision video for measures of location and spread coming this weekend :)
really good video, cheers
Thank you for watching! :)
Hi, do you have access to the edexcel online website?
Thank you
Hi, Sorry i'm not too sure specifically what you're looking for?
Are you looking for the edexcel site with access to the unlocked papers?
@@AJMaths yes
This link should word but if not just simply gooing Edexcel Past Papers will take you on the right path, the 2019 and 2020 papers are currently locked by edexcel as some teachers are apparently using them as part of assessments to determine grades
Really helpful, thank you
thnx a lot i understood everything
Thank u so much
Not a problem! Glad it helped! :)
Thank u Oml
great video. It would be even better if you spoke up a bit