INTERPRET ME
In a 100-item test, the passing mark is the 3rd quartile. What does it imply ?
A. The students should answer at least 75 items correctly to pass the test.
B. The students should answer at least 50 items correctly to pass the test.
C. The students should answer at most 75 items correctly to pass the test.
D. The students should answer at most 50 items correctly to pass the test.
A. The students should answer at least 75 items correctly to pass the test.
18,18,19,23,23,23,29,29,29,35,35,43,43,44,56
FIND MEDIAN
MEDIAN= 23
1,3,7,7,16,21,27,30,31
FIND THE LOWER QUARTILE(Q1)
Q1=7
1,3,7,7,16,21,27,30,31
FIND P78
P78=30
When a distribution is divided into 100 equal parts, each score point that describes a distribution is called________
PERCENTILE
The 𝐷7 of the Mathematics test scores of 50 students is 39. Which of the following statements is true?
A. 70% of the students got a score less than or equal to 39.
B. 70% of the students got a score equal to 39.
C. 30% of the students got a score less than or equal to 39.
D. 30% of the students got a score equal to 39.
A. 70% of the students got a score less than or equal to 39.
18,18,19,23,23,23,29,29,29,35,35,43,43,44,56
FIND 4TH DECILE
D4=29
1,3,7,7,16,21,27,30,31
FIND THE UPPER QUARTILE(Q3)
Q3=27
18,18,19,23,23,23,29,29,29,35,35,43,43,44,56
FIND P68
P68=35
IT IS THE DIFFERENCE BETWEEN HIGHEST VALUE AND LOWEST VALUE
RANGE
P67=94
________of the scores is less than or equal to 94
________of the scores is greater than the score of 94
67% of the scores is less than or equal to 94
33% of the scores is greater than the score of 94
1,3,7,7,16,21,26,27,30,31,45,46,49,49
FIND THE D8
D8=46
11,12,13,14,14,15,16,16,17,18
FIND LOWER QUARTILE
Q1=13
6,11,14,19,20,23,25,28,32,35,36,41,44,47,50
FIND P37
P37=23
_________is the number of observations within the class interval.
FREQUENCY
Ms. Rivera gave a quiz to her students in Statistics. The students finished their test in 50 minutes. This time is the 7.8th decile of the allotted time. What does this mean?
78% of the students are finished in their test less than or equal to 50 minutes
18,18,19,23,23,23,29,29,29,35,35,43,43,44,56
FIND 7TH DECILE
D7=43
11,12,13,14,14,15,16,16,17,18
FIND UPPER QUARTILE
Q3=16
1,7,9,5,4,8,6,3,15,12,19,14,7,5,2,11
FIND P48
1,2,3,4,5,5,6,7,7,8,9,11,12,14,15,19
P48=7
It means summing up the consecutive frequencies.
1. Philip took the entrance examination in San Pablo City Science Integrated High School. His score is in the 7th decile and the passing score is the 75th percentile. Suppose that 𝐷7 and 𝑃75 are not equal, can Theodoro enroll in that school?
A. Yes, because his score is greater than the passing score.
B. Yes, because his score is equal to the passing score.
C. No, because his score is equal to the passing score.
D. No, because his score is below the passing score.
D. No, because his score is below the passing score
6,11,14,19,20,23,25,28,32,35,36,41,44,47,50
FIND D6
D6=35
8,2,5,4,8,5,7,1,3,6,9
FIND QUARTILE 3
Q3=8
1,7,9,5,4,8,6,3,15,12,19,14,7,5,2,11
FIND P79
1,2,3,4,5,5,6,7,7,8,9,11,12,14,15,19
P79=14
The difference between Upper quartile and Lower quartile
Interquartile Range