Stats

Question 1

Answer 1

Question 2

Answer 2

.write down above your working’s words that describe what it wants e.g “he wants equal to this or less of that”
.and input different n into x to work out critical region

Question 3

If you want to know the number of rearrangement combinations

Answer 3

(n factorial)/ (r factorial)

Question 4

Answer 4

Question 5

Answer 5

that the line to the circle is not a tangent

Question 6

when doing trigonometric equation what should you remember

Answer 6

.at the end if one of the root shows up as an error you say “no real root” under that root (and don’t cross it off)
.at the end if you get a root by +/-360 (comes first) and it gives a good answer then you need to sketch the graph to see if there are any other possible answers connected to that answer
.round to nearest whole number

Question 7

when differentiating what should you remember

Answer 7

.don’t multiply it by -1
.if you want coordinates of turning points make dy/dx = 0

Question 8

what is evenly spread distribution of data called

Answer 8

Uniform Distribution

Question 9

Answer 9

Question 10

when working out the y-intersect in a modelling question what coordinate should you use

Answer 10

the one closest to the y-axis? H W 2021 P2

Question 11

when using the coordinate’s given in a modelling question what should you remember

Answer 11

to use the function that comes with that coordinate in the formula e.g if formula is Y = AlnX + B and you have coordinate’s X = 1, Y = 31 and when X = 12, Y = 71.
then for m = (71 - 31)/(ln 12 - ln 1)

Question 12

Answer 12

Question 13

when comparing data what word should you use

Answer 13

both