Math

Question 1

What is statistics?

Answer 1

Solving problems and answering questions by collecting and analysing data

Question 2

What is a mean?

Answer 2

When you add the numbers up and divide by how many there are

Question 3

What is mode?

Answer 3

The most common number

Question 4

What is median?

Answer 4

The middle value

Question 5

Describe measures of spread:

Answer 5

The middle 50% is the median, the bottom 25% is the lower quartile, and the top 25% is the top quartile.

Question 6

What are the 3 distributions?

Answer 6

Symmetrical, positively skewed, negatively skewed

Question 7

What is symmetrical skewed?

Answer 7

When the mean, mode, and median are all in the middle

Question 8

What is negatively skewed?

Answer 8

Skewed to the left (not dots on left side)

Question 9

What is Positively skewed?

Answer 9

Skewed to the right (no dots on right side)

Question 10

What is correlation?

Answer 10

How positive or negative the graph is or non-linear

Question 11

How do you know what correlation the graph is?

Answer 11

If its going uphill its positive and downhill is negative. If the dots are all together its perfect, if its kinda spread out its strong, if they are spread out but you can still see if its positive or negative then its moderate

Question 12

How do you know if its non-linear or no correlation?

Answer 12

Non-linear is if its going both uphill and down hill, no correlation is if you cant tell anything and the dots are spread out everywhere

Question 13

What does PPDAC mean?

Answer 13

problem, plan, data, analysis, conclusion

Question 14

What is problem?

Answer 14

what data to collect, who its from, and why its important

Question 15

What is plan?

Answer 15

How you gather the data

Question 16

What is data?

Answer 16

How it is organised and managed

Question 17

what is analysis?

Answer 17

exploring the data and reasoning with it

Question 18

what is conclusion?

Answer 18

answering the question and providing reasons

Question 19

What is probability?

Answer 19

The likelihood of an event occurring

Question 20

What are the two ways for working out probability?

Answer 20

Experiments and theory

Question 21

What is frequency?

Answer 21

The number of times a value occurs.

Question 22

What is the difference between bar graphs and histograms?

Answer 22

Bar graphs have gaps between their bars

Question 23

How do you know if you are meant to use a bar graph or histogram?

Answer 23

You use a histogram if the data is continuous

Question 24

What is continuous data?

Answer 24

Data that keeps going on, e.g heights

Question 25

What are outliers and clusters?

Answer 25

An outlier is separated from all the other data well a cluster is gathered around the main piece of data

Question 26

What is unimodal, biomodel, and multimodel?

Answer 26

Uni is 1, bio is 2, and multi is 3 peaks in graphs

Question 27

whats an alternate angle on a parallel line?

Answer 27

An angle on the other side of the middle line

Question 28

What is a co-interior angle on a parallel line?

Answer 28

Angles on the same side of the line both inside the parallel line (in the box)

Question 29

What is a corresponding angle on a parallel line?

Answer 29

Angles on the same side of the line but one is inside the lines and ones outside

Question 30

What are 3 types of triangles, how do you spell them, and what do they mean?

Answer 30

Scalene - no sides are equal. Isosceles - two sides are equal. Equilateral - all sides are equal.

Question 31

What is it called when theres a triangle in a circle?

Answer 31

Semi - circle

Question 32

What is the intercept in y = 5 - 2x and what is it called

Answer 32

5 and its called the y intercept

Question 33

Where is the gradient found in this y = 5 - 2x.

Answer 33

The 2

Question 34

What are the four line gradients called and positioning?

Answer 34

Positive (uphill), negative (downhill), undefined (up and down), zero (straight across)

Question 34

What is the formula for gradients of a line?

Answer 34

y = mx + c

Question 34

What way and where do the 4 quadrants go?

Answer 34

clockwise starting from top right corner

Question 35

What are bearings?

Answer 35

Direction measure from north in a clockwise direction

Question 35

What helps you to chose what function to use?

Answer 35

soh-cah-toa

Question 36

What are the three sides of triangles called in trigonometry?

Answer 36

Opposite (opposite angle), hypotenuse (longest side), adjacent (remaining side)

Question 36

What are pythagorus triples?

Answer 36

3,4,5

Question 36

using trigonometry what symbol do you use to find short and long side?

Answer 36

short - times long - divide

Question 36

How do you calculate a missing angle?

Answer 36

You push shift then sin cos or tan and bracket the two lengths of the sides

Question 37

How do you find the length of short and long sides using pythagorus?

Answer 37

square root of : long side - add them both squared short side - minus them both squared

Question 37

Difference between y intercept and gradient:

Answer 37

Gradient is the number with the x while the y intercept is just a number

Question 38

how many decimal places do you round a angle to ?

Answer 38

1d.p

Question 38

what is theta

Answer 38

it is a 0 with a line through it meaning unknown angle

Question 39

what are inverse trig functions?

Answer 39

cos tan or sin with a -1

Question 40

what is the difference between discrete and continuous data?

Answer 40

discrete u count continuous you measure

Question 40

how many digits do you always right bearings in?

Answer 40

3 - you can add 0 at the start if needed

Question 40

when you find short and long sides in trigonometry when do you times and divide?

Answer 40

when theres a number on the top you divide and when theres a number on the bottom you multiply

Question 41

m = what in coordinates

Answer 41

m = rise/run

Question 42

how do you use rise over run?

Answer 42

if the rise is 4 and the run is 2 the answer is 4/2 or 2/1 which is 2

Question 43

when given 2 coordinates what do you do?

Answer 43

go across then up then draw a line between them

Question 44

What is a multiple?

Answer 44

The numbers multiplied together

Question 45

What is a factor?

Answer 45

Numbers that divide exactly into another number

Question 46

When doing standard and ordinary form which i sis positive and which was is negative when moving the decimal point?

Answer 46

Positive - left Negative - right

Question 47

How do you calculate GST of a number?

Answer 47

Divide by 1.15

Question 48

How do you know to join the dots in a graph?

Answer 48

You join it if its continuous data

Question 49

What is continuous data?

Answer 49

Normally something you can measure like heights

Question 50

What is discrete data?

Answer 50

Normally an exact number like people in the class

Question 51

cm3 is what

Answer 51

mL

Question 52

When finding an angle if the numbers on the top or bottom what do you do?

Answer 52

If its on the top you divide, if the bottom, you times

Question 53

How do you show relationships on graphs?

Answer 53

The closer the dots the stronger, if is going uphill then its positive

Question 54

In a frequency table, how do you calculate the last column?

Answer 54

You times the two together

Question 55

how do you add gst to a numer

Answer 55

times by 1.15

Question 56

In inequalities how do you know if the circle is opened or closed and which way the arrow should point?

Answer 56

Closed if its the same as (arrow with line under) and the arrow points the way the symbol points

Question 57

How do you do limits of accuracy?

Answer 57

If it says round to nearest 10, half it and put 5 each side e.g 50 = 45 & 55

Question 58

How do you find a percentage of a number?

Answer 58

Divide the number by the percentages decimal form

Question 59

What is principal, rate and time?

Answer 59

principal - amount of money rate - percentage time - duration (time)

Question 60

Simplify algebraic surds and basic fractions.

Answer 60

Square root the number and divide the power by 2

Question 61

Angles on a straight line and interior angles add to

Answer 61

180

Question 62

Angles around a point and exterior anlges on polygons add to

Answer 62

360

Question 63

vertically opposite angles

Answer 63

are the same

Question 64

What is a co- interrior angle?

Answer 64

Inside the parallel lines in the same area ( add to 180 )

Question 65

What is alternate angle?

Answer 65

Both inside parallel lines but one on the other area ( same angle )

Question 66

What is corresponding angle?

Answer 66

one inside lines and one outside ( same )

Question 67

1m squared = how much L

Answer 67

1000

Question 68

Which side does the x go on in inequalities?

Answer 68

the side with more X's

Question 69

What is the gradient?

Answer 69

The number before the x

Question 70

If theres a 0 on a fraction what do you do? e.g -2/0

Answer 70

You leave the 0 out so the answer would just be -2

Question 71

What is the y intercept in gradients?

Answer 71

the c in the equation mx + c

Question 72

How do you find range?

Answer 72

Highest number - lowest number

Question 73

How do you do ratio?

Answer 73

Add the two ratios together, use that as the denominator then the the other numbers as the numertor e.g for ratio 2:3 = 2/5 and 3/5

Question 74

How do you do percentage change?

Answer 74

n-o/o or noo

Question 75

How do you caculate interest ?

Answer 75

number x percentage of interest/100

Question 76

what is the difference between solving and factorising quadratics

Answer 76

in factorising u stop after the brackets, in solving u go all the way until you find x or y

Question 77

when do we add or subtract. in simultaneous equations

Answer 77

add if different subtract if same (SS)