Statistics
The IQR is a measure of? (be specific)
The spread of the middle 50% of the data.
Convert 1km2 to m2
1km2 = 1000x1000 m2
= 1 000 000 m2
y = x2 + 4x + 8 is an equation for what?
Parabola
Who would most likely have the nickname Gonzo in the class?
Mr Jones
Why is compounding interest a better investment than simple interest?
Compounding interest generates extra income as the interest earned from a previous time period also accumulates interest.
According to 'deMilked' what % do natural blondes make up of the world's hair colour?
2%
Calculate the surface area of a triangular based pyramid whose face has a base of 2cm and perpendicular height of 1.7cm
S.A = 4(1/2 x 2 x 1.7)
= 6.8cm2
Make q the subject in the formula:
y(6q - 8) = g
(g/y + 8) / q
Who in the class could have the nickname 'buckets'?
Aiden and Cooper
What are some things you need to consider when working with interest on credit cards?
Change time periods to days
Change rate to days
Interest free period
Errors with including days interests is to be calculated on
Draw the 3 shapes for data distributions and label them with their description.
Positively skewed
Negatively skewed
Symmetrical
The weight of the Sydney harbour bridge is equivalent to how many Eiffel towers?
7
A job will take 4 people 16 days to complete. The same job for 2 people will take 32 days. What type of relationship is this?
Inverse
Cryptic question.
Which 2 students would I run into at the top of Mt Sugarloaf?
Kate WEST and Seth TOWERS
What common mistake is made when dealing with altering different time periods (think bigger picture)
Assuming a month is 4 weeks.
What is the chance of getting the same option 3 times in a row tossing a coin?
Bonus: show multiple method of reaching your solution
P (same) = 2 (0.5 x 0.5 x 0.5)
= 0.25
P (same) = 2 / 2x2x2
= 2/8
= 1/4
Draw a shape excluding rectangles and squares that has the area of 35cm2
Triangle 7 by 10
Trapezium height 5 lengths of 5 and 9
What in the game of basketball was created using algebra?
24 second shot clock
Who has a nickname that would be at home on an archery field?
Sienna 'Target'
Which would make more?
$100 000 invested for 97 years compounded yearly at 10%p.a
or
1c doubled everyday for a month (30 days)
PV = 100 000(1+0.1)97
= 1 035 357 802
230 = 1 073 741 824
Name the 4 percentage groups for a normal distribution.
68%
95%
99.7%
100%
A ruler measured the radius of bike wheel to be 23.4cm. What is the percentage error for this measurement?
absolute error = 0.5 x precision
= 0.5 x 0.1
= 0.05
% error = (0.05 / 23.4) x 100
= 0.21%
A table tennis salesman sells 10 bats for $200. Write the equation for this relationship and describe how the cost relates to the number of bats.
C = 20b
Direct proportion
Which person in the class could wear the nickname 'Drama Queen'?
Jaimeeeeeeeeee
Name 5 currencies from around the world that are not dollars.
Euro
Rand
Pound
Yen
Peso