Mrs. Willow’s class had a test over the material that has been covered the past 3 weeks. There are 25 students in her class. The numbers below represent the grades on the test of the 25 students:
98, 97, 65, 79, 85, 86, 95, 78, 62, 61, 88, 97, 96, 74, 75, 86, 99, 87, 69, 72, 80, 82, 90, 94, 86
Median:
1.
List the grade in acceding order.
2.
61,62,65,69,72,74,75,78,79,80,82,85,86,86,86,87,88,90,94,95,96,97,97,98,99
3.
Median= 86
Qualities:
Q1: The first half before the median number.
61,62,65,69,72,74,75,78,79,80,82,85
1.
Then find the median in between the first half which would be the Q1.
2.
That would leave as the median, since there is two then you add them together and then divided by two.
3.
74+75 = 74.5
2
4.
Median= Q1
5.
Q1= 74.5

Q2: The second half after the median number.
86,86,87,88,90,94,95,96,97,97,98,99
1.
Then find the median in between the second half which would be the Q2
2.
That would leave as the median, since there is two then you add them together and then divide by two.
3.
94+95 = 94.5
2
4.
Median= Q2
5.
Q2= 94.5
Lower Extremes:
61,62,65,69,72,74,75,78,79,80,82,85,86,86,86,87,88,90,94,95,96,97,97,98,99
Lower Extreme
Lower Extreme = 61
Upper Extremes:
61,62,65,69,72,74,75,78,79,80,82,85,86,86,86,87,88,90,94,95,96,97,97,98,99
Upper Extreme
Upper Extreme= 99