Descriptive Statistics^

Question 1

Measure of Central Tendency

Answer 1

Mean
Median
Mode

Question 2

Mode

Answer 2

value that is repeated the most
+ used when data is in categories so you know the most popular
- not useful in other sets of data as it doesn’t give important info

Question 2

Measures of Dispersion

Answer 2

Range
= highest value - lowest + 1
Standart Deviation
= how distanced the values is

Question 2

Mean + AO3

Answer 2

average
add all then divide by numbers of values
+ most representitive measure as it uses all values
- can be distorted by extreme values

Question 2

Median

Answer 2

middle value
+ extreme value does not affect the data
- ignores highest and lowest value

Question 3

Range

Answer 3

highest value - lowest + 1+ simple and easy to calculate- only takes into account the two extreme valueignores other, don’t know dispersion

Question 4

Standard Deviation

Answer 4

shows how distanced the values/ mean is
the largest the SD is the greatest, the dispersion is
+ most precise representation of spread of data
- it can be distorted by extreme scores