Pandersen+Wiki+assignment+3

Paul Andersen Date of submission: Assignment Date: November 8th, 2010 Due Date: December 6th, 2010 Math Block 6G Wiki assignment 3 Making Graphs using Technology: Data About Us

Pg 69-70, #1-3, Data About Us

Make a graph of the lengths of the 25 alligators and write a sentence describing the distribution of lengths shown in the graph.

Problem 1, A. There is a lot of alligators between 70 inches to 90 inches. And therer is an outlier.

B. What is the mean and the median of the lenghts?

The mean is 84.96 The median is 85

Problem 2. Pg 70, Data About Us.

A.

B. What is the mean and the median of the wieghts? Mean = 108.2 Median = 80

C. What is the range of the weights?

The range is 28-640

Problem 3 pg 70, Data About Us

3. Explore the relationship between the length and weight of Florida alligators

A. Display the data in a coordinate graph of lenghts and weight of the alligators.

B. What relatoinship do you notice between lenghts and weights of alligators that are

1. 61 and 63 inches long? 2. 82, 85, and 86 inches long? 3. 90, 94, and 114 inches long?

Answers: 1. The weight is a smaller than the 61, 63.

2. The numbers is nearly the same.

3. The alligator that is 114 inches long, nearly got the double of it's lenght. But the others have an increase that is not critically.

C. What weight would you predict for an alligator that is

1. 70 inches long? 2. 100 inches long? 3. 130 inches long?

answer: 1. The weight might be less then the lenght.

2. The weight will be kind of the same.

3. The weight will be twice as much as the length.

D. Based on your study of the alligators lenght and weight data, do you believe it is possible to make a good estimate for the weight of an alligator if you know its lenght?

I think it's possible because what I notice from the that data, that 50-80 the weight is smaller. From 80-120 the weight is quietly the same. From 120 and above it's double as much as the lenght. So if the number is between those I think it is possible.

Explaining Your Reasoning-When you decribe a collection of data, you look for the shape of the distribution of the data. You can ofthen visualize data patterns using graphs.

1. How do the mean and the median help describing the numbers in the data set

knowing the mean helps you because then you know what the average is, of the data. And knowing the median helps you because then you know what is the middle number.

2. How does the range help in describing the numbers in a data set?

knowing the range helps you because you know were the data set start and were it end.

3. What kind of numerical data are best diplayed with

A. Line plots? B. Stem-and-leaf plots? C. Coordinate graph?

I think the best one for diplaying numerical data is B (stem-and-leaf plot) because it shows the constrasting if you make a BTBSL. And it's fast to analyze.

4. What does it mean to say that a person's armpsan is related to his or her 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?

It means that they effect each other in negatively and positively way. It could also mean that it is similar or the same.