skills

Question 1

On youre average OS map how far is a gid sqare

Answer 1

1km or 1000m

Question 2

can there be multiple modes ?

Answer 2

Yes

Question 3

how do you work out the medium if there are 2 central values

Answer 3

• you work out the mean of thoes values

Question 4

when finding the interquatile in the interqautile range, do u include the medium if its a set of even numbres ?

Answer 4

No

Question 5

all maths u need here

https://www.google.com/search?q=geography+a+level+maths+questions&oq=geography+alevels+maths+&aqs=chrome.1.69i57j0i22i30l5j0i390l3.7519j0j15&sourceid=chrome&ie=UTF-8#fpstate=ive&vld=cid:10da90a1,vid:BZdngrMJ28I

Question 6

reset calculator video

Answer 6

https://www.youtube.com/watch?v=bVjbHobGgx0

Question 7

how do u do standard deviation

Answer 7

• work out the mean
• work out how much each data set deviates from the mean ( x- mean )
• square that diffence so nun are - number
• then u add all the squares up and work out the average according to the number of data piece u have
• then finally you square root that number

Question 8

how do u do a spearmans rank corrilation

Answer 8

• Rank from highest to lowest both data sets
• if more than 1 pieces of data have the same value u add up all the ranks , E.g. 1+2+3 and then devise them work out the mean rank. so in this case 2. all data sets are then given a rank of 2 and u skip 1 2 and 3
• then u work out the differnce between the ranks (rank 1- rank 2 )
• then u square the diffence value to get rid of squares
• then u add them all up
• that value =D squared (D2)
• then u put it in the formula
• N in the formula = number of values

Question 9

what will a spearmans rank corrilation always be between

Answer 9

0-1

Question 10

How to do spearmans rank

https://www.youtube.com/watch?v=PhHCp-UJVsk

Question 11

with a spearmans rank corrilation for it to be a possitive corrilation (more reated) do u want to value to be closer to 1 or 0

Answer 11

1

Question 12

How to do standard deviation

https://www.youtube.com/watch?v=3YmePGpoVAc

Question 13

in a regular odd numbre sequence question do you include the mean in working out the interqutile range

Answer 13

no you dont

Question 14

what does standard deviation tell us

Answer 14

• the variabillity of a datat set
• speciffically the average deviation from the mean

Question 15

before working out the medium or range or interquatile range what must you firts do

Answer 15

put the data set in order

Question 16

what does spearmans rank tell us

Answer 16

• the correlation coefficent of two data sets
• if and to what extent two data sets are corrilated

Question 17

what do differnt spearmans rank scores tell us

Answer 17

• -1 perfect negtive corrilation
• 1 is a perfect possitve corrilation
• 0 is no correlation
• 0.2 or soemthing therfore would be a low correlation

Question 18

can you have a spearmans rank correlation of more than 1

Answer 18

no or youve done it wrong

Question 19

is there an upper or lower limmit to standard deviation

Answer 19

in theory no