1 statistics - percentile may 18
DESCRIPTION
TRANSCRIPT
1
2
Grade 10 test results from 10 students
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17
Test out of 26
Calulate the mean:
3
Determine the mode:
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17
4
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17
Determine the median:
5
Calculate your percentage if your mark was 17.
6
Calculate your PERCENTILE RANKING
Ranking: how does one mark comparewith all the others.
5 + 0.5(1)10
X 100PR =
= 55%
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17
7
Equation:
B: the number of scores Below a given score
E: the number of scores Equal to a given score, including the given score.n: the total number of scores
** do not show with decimal values, round up to next whole number**
PR = B + 0.5(E)n
X 100
8
What if your mark was 12?
Percentage: 46%
Percentile Ranking: 25th percentile
12, 14, 4.5, 16, 22, 20, 11, 22, 19, 17
9
Your Assignment
Page VF6
Questions 1 7