ShmoopTube
Where Monty Python meets your 10th grade teacher.
Search Thousands of Shmoop Videos
CAHSEE Videos 392 videos
CAHSEE 1.2 Passage Drill. Which of these sentences from the story best illustrates the sensitive side of the narrator's nature?
CAHSEE 1.3 Passage Drill. Which of the following is the best way to express the meaning of the word alumni in this sentence?
CAHSEE 1.4 Passage Drill. What does the use of flashbacks accomplish in "Graduation"?
CAHSEE Math 2.1 Statistics, Data, and Probability I 178 Views
Share It!
Description:
Statistics, Data, and Probability I: Drill Set 2, Problem 1. What was the median number of days that the 30 students were absent?
Transcript
- 00:04
And here's a shmoopy question for ya...
- 00:06
In a class of 30 students, the following chart gives the number of students who had missed
- 00:11
class, and the number of days out of an entire month during which they had done so.
- 00:16
And here's the table or... uh... data set if we'd prefer to channel our inner nerd...
- 00:21
The median number of days that the 30 students were absent was... what?
Full Transcript
- 00:26
Here are the potential answers:
- 00:33
So, this question takes a big dental pick to reallllly
- 00:36
dig in to see whether or not we understand the concept of Median.
- 00:41
Remember that Median is Latin for "middle"... or at least the "med" part is.
- 00:45
As in... medium.
- 00:46
The "ian" part is like "radian" which kinda sorta means... "measure".
- 00:50
So the question is really asking... what's the "middle measure" in this data set?
- 00:55
Well, the brute force way to do this problem is to just
- 00:57
lay out the numbers in front of us as we talk through them.
- 01:00
And here's what that looks like:
- 01:02
Now let's talk through the problem so we can understand what these evil testing people are asking...
- 01:10
9 students -- goody two shoes -- missed NO classes.
- 01:13
Not even on senior ditch day did they... ditch.
- 01:17
There were 11 students who missed just ONE day. They might have actually been sick.
- 01:22
There were a half dozen who missed 2 days, 2 party animals who missed 3 days,
- 01:27
1 derelict who missed 4 days, and another super-derelict who missed 5.
- 01:32
Now all you have to do is cross out the high and cross out the low.
- 01:36
And you're left with the middle two terms, which are... ones -- that is...
- 01:40
...term 15 and 16 which are the middle two terms in a data set of 30 elements.
- 01:46
You don't need to average them -- well, you could -- but that'd be pretty dull, as 1 and
- 01:49
1 averages to... uh, yeah... one.
- 01:51
So the answer is B. Or 1. It's the loneliest number.
Related Videos
CAHSEE Math: Algebra and Functions Drill 5, Problem 3. Solve the equation.
Statistics, Data, and Probability I: Drill Set 3, Problem 4. How many different avatars can be created based on the given options?
Statistics, Data, and Probability II Drill 3 Problem 2. Which two sports together make up for the preferences of more than half of all those w...
Statistics, Data, and Probability II Drill 3 Problem 3. One hundred twenty of those who were asked preferred what sport?