A-Level Edexcel Statistics S1 June 2008 Q2a,b (Median and Quartiles) : ExamSolutions

[MrSqilz]

the reason why 39 isn't the mode is because the question is askinig 'for balmoral hotel'
you'll see that there are 2 sections: 1 for abbey hotel, and the other for balmoral.
if the question asked for abbey hotel, then the mode would be 39.

[ExamSolutions_Maths]

@omar3211 Nope - in Balmoral it is 50 as it occurs 4 times

[ExamSolutions_Maths]

@stefjw21 To find the middle value. The middle of 3 numbers is the 2nd number. (3+1)/2 = 2 the 2nd number in. and so on.

[ExamSolutions_Maths]

I never use this method as it is to confusing where you have to round up or round down at times. I prefer the method I use in my tutorials.

[stefjw]

@ExamSolutions thanks i think i get it ive watched most of ur vids and it is so easy to understand when watchin ur vids.

[ExamSolutions_Maths]

@Insane54321 This does not give the middle value of n values to the left of the median. (See my tutorials on this for the median of discrete data)

[MrApplesucksass]

The question asks only in the Balmoral hotel. Just sat here thinking the same thing and then i saw it.

[personager]

So would it be correct to do (n+1)/4 for the lower quartile and 3(n+1)/4 for the upper quartile?
If not, then what would one do when they'd have to find the n.25th or n.75th value?

[stefjw]

Why dd u add 1 when you was finding the position of Q1 and Q2

[spotofgolf]

39 is as frequent as 50, why is there no mention of it?