Qualitative data has no numbers.

Quantitative data is anything dealing with numbers.

Discrete data comes in whole numbers.

Continuos data is what you measure.

__Types of Data__Qualitative data has no numbers.

Quantitative data is anything dealing with numbers.

Discrete data comes in whole numbers.

Continuos data is what you measure.

11 - 20

21 - 30

31 - 40

41 - 50

51 - 60

__Discrete Data can be grouped like this:__

Height in cm

1 - 10Height in cm

11 - 20

21 - 30

31 - 40

41 - 50

51 - 60

There is the more than and equal to sign, the more than sign, then less then and equal to sign and the less than sign.

__Continuos data is grouped so every measurement is included.__

There is a variety of signs used in continuos data.There is the more than and equal to sign, the more than sign, then less then and equal to sign and the less than sign.

**The sign above is the less than and equal to sign. The sign shouldn't have a line at the bottom, the line should be just in front of the bottom line of the crocodile teeth.**

**The sign above is the less than sign.**

**The sign above is the more than and equal to sign. The line shouldn't be at the bottom, it should be just in front of the bottom line of the crocodile teeth.**

**The sign above is the more than sign.**

__Continuos data can be grouped like this:__

Height (h) in cm

0 then the less than and equal to sign h then the less than signHeight (h) in cm

**10**

10 then the less than and equal to sign h then the less than sign

10 then the less than and equal to sign h then the less than sign

**20**

**Mode, Median, Range and Mean**

**Range = The difference between the smallest and largest number.**

Median=The middle number from smallest to largest after you have cancelled down. If there is two numbers in the middle after cancelling down then you add them together and divide by 2. Also you can count how many numbers there are, divide by 2. If it is a decimal number then you round it up but if not you keep the whole number the same.Once you have done this and say your number is 2. You would count till the second number and that is the median.

Mode = The most common number.If there isn't any numbers that appear more than once the mode would be no mode. Say the number 2 appeared three times and so did the number 4. Then they would BOTH be the mode.

Mean= Add up all the numbers and divide by how many

numbers there are.

Median=The middle number from smallest to largest after you have cancelled down. If there is two numbers in the middle after cancelling down then you add them together and divide by 2. Also you can count how many numbers there are, divide by 2. If it is a decimal number then you round it up but if not you keep the whole number the same.Once you have done this and say your number is 2. You would count till the second number and that is the median.

Mode = The most common number.If there isn't any numbers that appear more than once the mode would be no mode. Say the number 2 appeared three times and so did the number 4. Then they would BOTH be the mode.

Mean= Add up all the numbers and divide by how many

numbers there are.

Mode = Mode and most both begin with 'MO'. This is

a good way of remembering them.

Median = Median and middle sound the

same. They both have 'M ' and 'D'. This is how you can remember

them.

__How to remember Mode and Median__Mode = Mode and most both begin with 'MO'. This is

a good way of remembering them.

Median = Median and middle sound the

same. They both have 'M ' and 'D'. This is how you can remember

them.

__Question 1__

Here is you set of data. Now find the mode, median, range and mean.**82, 82, 73, 74, 79**

Range = 9 because 82 - 73 = 9.

Median = 79 because when the numbers are in order they are : 73, 74, 79, 82, 82. Once you crossed the first

number, then the last, then the second and finally the fourth you are left with 79. This is the middle number. It is easier to cancel down with less data.

Mode = 82 because it comes up twice and all the other numbers come up once.

Mean = 78 because when the numbers are added together they equal : 82 + 82 + 73 + 74 + 79 = 390. There are 5 numbers

so 390 divided by 5 equals 78.

Range = 9 because 82 - 73 = 9.

Median = 79 because when the numbers are in order they are : 73, 74, 79, 82, 82. Once you crossed the first

number, then the last, then the second and finally the fourth you are left with 79. This is the middle number. It is easier to cancel down with less data.

Mode = 82 because it comes up twice and all the other numbers come up once.

Mean = 78 because when the numbers are added together they equal : 82 + 82 + 73 + 74 + 79 = 390. There are 5 numbers

so 390 divided by 5 equals 78.