Chapter 4 - Data

Question 1

Primary data

Answer 1

• Collected by the person doing the investigation
  -first hand

Question 2

Secondary data

Answer 2

• Using data that someone else has collected & stored
• second hand

Question 3

Qualitative / categorical data

Answer 3

Non - numerical data
- e.g colours, names, places-yes, no

Question 4

Quantitative / numerical data & it’s two divisions

Answer 4

• Numerical
• discrete- certain value, counting
  -continuous- between 2 given values, measuring

Question 5

How do you find an angle to make a pie chart

Answer 5

• Find total
  -write a fraction with the data of angle as the numerator & total as denominator
• multiply that fraction by 360

Question 6

What is unsorted data called

Answer 6

Raw data

Question 7

How do you get data from a pie chart (in specifics, e.g number of ppl, number of hours)

Answer 7

• Measure the angle
• make it a fraction with 360 as denominator
• simplify the fraction
• multiply that fraction by the total of the pie chart

Question 8

How do you find percentage from a pie chart

Answer 8

• Make a fraction with the total as denominator & the number of which the percentage you want to find
• multiply that fraction by 100

Or
- do angle number over 360 multiplied by 100