Year 11 Flashcards
What are the two main categories of data?
a. Numerical/Quantitative (no.)b. Categorical (groups, words)
What are the two types of numerical data?
a. Discrete (counted values, whole numbers)
b. Continuous (measured within a range eg. 25.2cm)
What are the two types of categorical data?
a. Nominal (no order)
b. Ordinal (can be ordered)
How is population measured using the capture recapture method?
- Capture sample, tag release
- Take 2nd sample, tagged amount represents their amount of total population
- Eg if 30% of 2nd capture tagged and 30 were originally captured total pop = 100
What is a pareto chart? How do you read one?
A pareto chart is a bar chart and cumulative line graph combined.
- Starting at horizontal axis, descending order categories
- Cumulative frequency calculated in line
Rules for indices…
- Multiplying?
- Dividing?
- Brackets eg (a²)² ?
- Multiplying = add indices
- Dividing = subtract indices
- Brackets = multiply indices
What percent of weekly pay is leave loading?
- 5%
eg. 17.5% x weekly pay x no. of weeks
10% GST is added to a good (total price =$11), how do I find the original price?
= 11 / 110%
What is the formula for event probability?
P(E) = no. of favourable outcomes/ total no. of outcomes
What does each statement mean?
- A and B ?
- A or B ?
- 1 boy at most?
- A and B occurring together
- One occurring
- Can mean 0 boys
What is the limit of a reading unit?
The smallest unit on device
Eg. 14.14cm = precision of 0.01cm
What are the 4 Significant Figure Rules?
- All non 0 = sig
- 0 between non 0 = sig
- 0 at end of decimal = sig (show precision)
- All other 0 = not sig
What are the 4 Significant Figure Rules?
- All non 0 = sig
- 0 between non 0 = sig
- 0 at end of decimal = sig (show precision)
- All other 0 = not sig
Find Scientific Notation on Calculator?
Shift … Set up … Scientific (select required no. of digits)
What is the formula for kite area?
= 0.5xy
x (width)
y (height)
