Tbachmann+Wiki+Assignment+3

Wiki Assignment 3 Data About Us: Looking Back And Looking Ahead

Date: 21. Nov. 2010 Date Assigned: 8. Nov. 2010 Due Date: 6. Dec. 2010 Making Graphs Using Technology: Data About Us

1.A: I have to make a graph that shows the lengths(inches) of 25 alligators.

This is my stem and leaf plot.

1.B: I have to find the mean and median of the alligator lengths.

The mean is 84.96 inches. The median is 85.0 inches.

1.C: I need to find out the range of the alligator lengths.

The range is 58 till 147 inches.

2.A: I have to make a graph of the weights of the alligators.



2.B: I have to make a table to display the data. (pounds) ||
 * Alligator number || Lenght (inches) || Weight
 * 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 || 79 || 57 ||
 * 20 || 86 || 80 ||
 * 21 || 72 || 38 ||
 * 22 || 74 || 51 ||
 * 23 || 147 || 640 ||
 * 24 || 76 || 42 ||
 * 25 || 86 || 90 ||

2.C I have to find out the median and the mean of the data. The mean is 108.2 pounds. The median is 80.0 pounds.

2.D : I have to find out the range of the data. The range is 28 till 640 pounds.

3.A I have to make a coordinate graph of the data of the alligators.

3.B What is the relation of the alligator length and weight that are - 61 and 63 inches long: The number of inches of length is higher than the number of pounds weight. - 82, 85 and 86 inches long: The number of inches in the length is almost the same as the number of pounds in the weight. - 90, 94 and 114 inches long: The number of pounds in the weight is bigger than the number of inches in the length.

3.C What is the weight of the alligator if it is - 70 inches long: The weight would be a little less say about 60 pounds. - 100 inches long: The weight would be more than the number of inches, may be about 140 pounds. - 130 inches long: The weight would be a lot more than the number of inches, say about 500 pounds.

3.D Would you be able to tell the weight of an alligator if you knew its length? Not exactly but I could make a reasonable estimate based on the graph.

Looking back and ahead 1. How does knowing the mean and the median help you in a numerical problem? The mean would give me the average number of the total data, and the median shows me which numbers are higher and which are lower as it lays in the middle. 2. How would the range help you in a problem? The range gives me information from where to where the data go.