kpattaranavakul+Wiki+Assignment+3

__//Wiki Assignment Number 3//__

Kannapat God Pattaranavakul Wiki Assignment 3 Assignment Date: November 21st 2010 Due Date: December 6th, 2010 Making Graphs using Technology: Data About Us

1) **//Consider the lenghts of the alligators in the sample.//** a. Make a graph of the lengths of the 25 alligators and write a sentence describing the distribution of lengths in the graph. My own words: By looking at the 25 alligators then I have to make a graph about the lengths and then I have to write a sentence describing the distribution of lengths in the graph. Graph:

**Sentence: The Maximum is 147 in. and the Minimum 58 in. Also the median length is 82 in.**
b) What are the mean and median length? My own words: Find the median and the mean of this data. Answer: Median:**85.0 in** Mean: **84.96 in** c)what is the range of this length? My own words: find the range of this length data. Answer: the range of this data is from 58 ins to 147 ins

2)**//Consider the weights of alligator in the sample.//**
a) Make a graph of the weights of the 15 alligators and write a sentence describe the distribution of weights shown in the graph. My own words: i have to make a graph that shows the data of weights of the 25 alligators. graph:

**//Sentence: It was really cool seeing that one alligator weight more then 600 pounds (WOW) and i think that that is the outlier//**
b) What are the mean and median weights? Answer: Mean: **//108.2 pounds//** Median: //**80 pounds**// c) what is the range of the weights? Answer: the range of this data is from 0 - 700 and also from 1 - 25.

3) **//Explore the relationship between the lengths and weight of Florida alligator.//** a) make a coordinate graph of the (length,weight) data. Graph: b) What relationship do you notice between length and weight of alligators that are: i.61 and 63 inches long? ii. 82, 85 and 86 inches long? iii. 90, 94 and 114 inches long?

Answer for number b: i) The relationship that I see in the alligators that is 61 and 63 inches long is like there really weight a lot but they are really short and so they are not perfect alligators. ii) I have noticed that their length is bigger and larger then there weight so these alligator are too strong. iii) I have notice from looking is that there the outlier like there the biggest and longest and they have the most weight and there the biggest !

c) What weight would you predict for an alligator That is: i) 70 inches long? ii) 100 inches long? iii) 130 inches long?

Answer for number C: i) An alligator that is 70 inches long would probably be about 75 pounds. ii)An alligator that is 100 inches long would probably be about 110 pounds. iii) An alligator that is 130 inches long would probably be about 145 pounds.

d) Based on your study of the alligators length and weight data, do you believe it is possible to make a good estimate for the weight of an alligator if you know its length? My own words: could you find out a alligators weight if u know the alligators length? or Could you find out a alligators length if u know the alligators weight? Answer: Yes you could find out the length of the alligator if you know there weight, but it wouldn't be EXACT but close!

//**Explaining Your Reasoning--**// When you describe a collection of data, you look for the shape of the distribution of the data. you can often visualize data using graph. 1) How do the __//**mean**//__ and the __//**median**//__ help in describing the number in the data set. Answer: You can see the data only with the mean and the median, it just help you describe how the data looks. 2)How does the __//**range**//__ help in describing the number in the data set. Answer: It helps you by like, make you see where the number are a lined and like from 20 - 90 and stuff like that! 3)What kinds of numerical data are the best displayed with: a) line plot b) Stem-and-leaf plot c) Coordinate graph Answer: coordinate graph because is shows us all the information we need and it also shows us the line!

4) What does it mean to say that a person's arm spans **//is related//** to his or her height,or that the times it takes to travels to school is related to the distance traveled, or the weigh of an alligator is **//related//** to it's length. Answer: Its saying like, um, you have to make a graph to display the data and its information.

The idea about numerical and graphic data analysis that u have learned in these unit will be used and extended in a variety of future connected mathematics units, especially sample and population where u will collect, organize, and display numerical information. you'll also find that various statical plots and data summaries appear in everyday news reports and in the technical work of science, business, and Governor.