Jhan+Assignment+3


 * Jun Hyuk Han **
 * Date of submission: December 4th **
 * Due Date: December 6th **
 * Date assigned: November 8th **
 * Math 6E **
 * Wiki assignment 3 **
 * Topic: Making graphs using technology: Data about us **


 * Problem 1a: Make a graph of the lengths of the 25 alligators and write a sentence that describes the distribution of the lengths shown in the graph. **

Table of the length of the gators
 * Gator number || length(inches) ||
 * 1 || 74 ||
 * 2 || 94 ||
 * 3 || 85 ||
 * 4 || 61 ||
 * 5 || 128 ||
 * 6 || 72 ||
 * 7 || 89 ||
 * 8 || 90 ||
 * 9 || 63 ||
 * 10 || 82 ||
 * 11 || 114 ||
 * 12 || 69 ||
 * 13 || 86 ||
 * 14 || 88 ||
 * 15 || 58 ||
 * 16 || 90 ||
 * 17 || 94 ||
 * 18 || 68 ||
 * 19 || 78 ||
 * 20 || 86 ||
 * 21 || 72 ||
 * 22 || 74 ||
 * 23 || 147 ||
 * 24 || 76 ||
 * 25 || 86 ||

I chose the stem and leaf plot for graphing the "length of the gators" because I can find out the median, mode, and the range fairly quickly. Also, making the graph is easy.


 * Problem 1b: What are the mean and median lengths? **

To find out the mean, you need to add all the data up, and then divided by how many data there are. 58+61+63+68+69+72+72+74+74+76+78+82+85+86+86+86+88+89+90+90+94+94+114+128+147=2124 2124/25=84.96

The mean is the middle value from an order of big to low or low to big. 58,61,63,68,69,72,72,74,74,76,78,82,85,86,86,86,88,89,90,90,94,94,114,128,147

85 inches is the median of the data.


 * Problem 1c: What is the range of the data **

range is from 58 to 147 inches.


 * Problem 2a: **** Make a graph of the weights of the 25 alligators and write a sentence that describes the distribution of the weights shown in the graph. **


 * Gator number || weight(pounds) ||
 * 1 || 54 ||
 * 2 || 110 ||
 * 3 || 84 ||
 * 4 || 44 ||
 * 5 || 366 ||
 * 6 || 61 ||
 * 7 || 84 ||
 * 8 || 106 ||
 * 9 || 33 ||
 * 10 || 80 ||
 * 11 || 197 ||
 * 12 || 36 ||
 * 13 || 83 ||
 * 14 || 70 ||
 * 15 || 28 ||
 * 16 || 102 ||
 * 17 || 130 ||
 * 18 || 39 ||
 * 19 || 57 ||
 * 20 || 80 ||
 * 21 || 38 ||
 * 22 || 51 ||
 * 23 || 640 ||
 * 24 || 42 ||
 * 25 || 90 ||



The mean number of weight for the 25 alligators is 108.2 pounds. I found the mean out by looking at the data above.
 * 2b: What are the mean and the median weights? **

The median number of weight for the 25 alligators is 80 pounds. I found the mean out by looking at the data above.

The range of the data is from 28 to 640 pounds.
 * 2c: What is the range of the data? **


 * 3a: Make a coordinate graph **


 * Gator Number || Length(inches) || Weight(pounds) ||
 * 1 || 74 || 54 ||
 * 2 || 94 || 110 ||
 * 3 || 85 || 84 ||
 * 4 || 61 || 44 ||
 * 5 || 128 || 366 ||
 * 6 || 72 || 61 ||
 * 7 || 89 || 84 ||
 * 8 || 90 || 106 ||
 * 9 || 63 || 33 ||
 * 10 || 82 || 80 ||
 * 11 || 114 || 197 ||
 * 12 || 69 || 36 ||
 * 13 || 86 || 83 ||
 * 14 || 88 || 70 ||
 * 15 || 58 || 28 ||
 * 16 || 90 || 102 ||
 * 17 || 94 || 130 ||
 * 18 || 68 || 39 ||
 * 19 || 78 || 57 ||
 * 20 || 86 || 80 ||
 * 21 || 72 || 38 ||
 * 22 || 74 || 51 ||
 * 23 || 147 || 640 ||
 * 24 || 76 || 42 ||
 * 25 || 86 || 90 ||
 * 3b: What relationship do you notice between length and weight of alligators that are... **

Both of them has weight that is visible by 11. Both of the length also has a weight that is lower than their height.
 * i: 61 and 63 inches long?**

All of them has a weight that is very close to their length.
 * ii: 82, 85 and 86 inches long?**

All of them has a weight that is larger than their length.
 * ii: 90, 94, and 114 inches long?**


 * 3c: What weight would you predict for an alligator that is... **

I would predict about 40 to 60 pounds because most of the alligators in the data has a weight between 40 to 60 pounds.
 * i: 7o inches long?**

I would predict about 120 to 140 pounds because most of the alligators in the data has a weight between 120 to 140 pounds.
 * ii: 100 inches long?**

I would predict about 370 pounds because there is one alligator in the data that has a weight close to 130, and the alligator is about 370 pounds of weight.
 * iii: 130 inches long?**

Yes, I think it is possible to estimate a alligator's weight if I know its length. You can compare one alligator's length to another alligator that has the same length, then the weight is probably going to be about the same.
 * 3d: Do you think it is possible to estimate an alligator's weight if you know its length? **

__** EXPLAINING YOUR REASONING **__

**1: How does the mean and the median help on describing the numbers in a data set?** First of all the mean and the median helps describing a data set of numbers, because mean and median is information itself. So if you add a mean and a median to a data you are adding more information to information which helps describing the data set.

**2: How does the range help in describing the numbers in a data set?** The range is also a useful thing to add to a data set. Because the range gives out the lowest number and the highest number at the same time.


 * 3: What kinds of numerical data are best displayed with... **

For line plots, the best kind of numerical data is a set of numbers that has a median, mode, mean and range.
 * a .line plots? **

** The best kind of numerical data for a stem-and -leaf plot is a set of numbers that has lots of outliers and/or large number of data. **
 * b. stem-and-leaf plots? **

The best kind of numerical data for a coordinate graph is two related data being bonded to each other so the reader can figure out what would be "perfect."
 * c. coordinate graphs? **


 * 4. What does it mean to say that a person's arm span is //related// to their height, or that the time it takes to travel to school is //related// to the distance traveled, or that the weight of an alligator is //related// to its length? **
 * When you say something is related to something, it means that the two data is being compared to find out differences and similarities. Related also means that the two data is alike and/or the same some how.**