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i've done this once before in class but i can't remember how its done...it's something to do with fractions/ratios in the frequency table i think

anyone like to help?

plus, do we actually need to know this for gcse? i've only ever seen it in the textbook at school but not in any gcse revison guide/revision site

i guess it would be nice to know any how

so guys how is it done ?

anyone like to help?

plus, do we actually need to know this for gcse? i've only ever seen it in the textbook at school but not in any gcse revison guide/revision site

i guess it would be nice to know any how

so guys how is it done ?

So how do you work it out if no values are given

Ah right thanks

How do you do it ?

I have a question :

Time (m) Frequency FD CW

0<m<20 20 1 20

20<m<30 30 3 10

30<m<40 45 4.5 10

40<m<60 60 3 20

60<m<100 48 1.2 40

1) Work out an estimate for the median time : ................ minutes

CAN SOMEONE PLEASE HELP ME, AND SHOW ME HOW TO WORK IT OUT

Step by Step (The f column adds up to 203. If you divide that by 2 you get 101.5 ~ then you work out the class it is in ???)

THE ANSWER IS : 41 -43 minutes

I JUST NEED TO KNOW HOW TO WORK IT OUT ... my gcse is tomorrow :O

Thanks

I have a question :

Time (m) Frequency FD CW

0<m<20 20 1 20

20<m<30 30 3 10

30<m<40 45 4.5 10

40<m<60 60 3 20

60<m<100 48 1.2 40

1) Work out an estimate for the median time : ................ minutes

CAN SOMEONE PLEASE HELP ME, AND SHOW ME HOW TO WORK IT OUT

Step by Step (The f column adds up to 203. If you divide that by 2 you get 101.5 ~ then you work out the class it is in ???)

THE ANSWER IS : 41 -43 minutes

I JUST NEED TO KNOW HOW TO WORK IT OUT ... my gcse is tomorrow :O

Thanks

Frequency Density = Frequency / Class width

so Frequency = Frequency density X class width

Once you've found frequency...

Median = n/2 (where n is total frequency)

Once you've found median add up to frequencies until you've got up to your median and look at which class interval it lies in.

so Frequency = Frequency density X class width

Once you've found frequency...

Median = n/2 (where n is total frequency)

Once you've found median add up to frequencies until you've got up to your median and look at which class interval it lies in.

Hello I was just wondering what happens if i have two medians (middle values) in my histogram ???please help! I have an assignment about it and am completely lostHelp needed ASAP if able Thanks a billion

Original post by Horselover29

Hello I was just wondering what happens if i have two medians (middle values) in my histogram ???please help! I have an assignment about it and am completely lostHelp needed ASAP if able Thanks a billion

Hi, this is a very old thread so I am going to close it. Instead please start a new thread with your question indicating what level you are at e.g. GCSE/A Level. It would also be very useful if you post an example question with your attempt.

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