Year 10 Data Analysis, and sets

Question 1

Types of averages

Answer 1

Mean
Median
Mode

Question 2

Find mean

Answer 2

Add up all the values
Then divide this number by how many values there are

Question 3

Find range of a set of values

Answer 3

Largest number in the set - smallest number in the set = range

Question 4

Find median

Answer 4

MIDDLE value when the data is arranged in order from smallest to largest
If there is even number of values, find mean of middle 2 terms

Question 5

Find mean of frequency table

Answer 5

Find the middle value for each class eg. 0 < x < 10 will have middle value of 5
Multiply each middle value by its frequency, from the table
Mean of a frequency table =
total of all classes multiplied with their corresponding frequencies / total of all frequencies

Question 6

Find frequency density for histograms

Answer 6

FD = frequency / class width

Question 7

Set (maths)

Answer 7

Collection of well defined objects
Objects here are called “elements” or “members.”