Question

Scientists collect information on many kinds of wildlife, and for a variety of reasons. Through their research they learn about the animals' habits, populations, and locations. Such information can help them learn more about the animals, protect endangered species, detect changes that may signal environmental problems, or keep track of animals that may present risks to humans. In central Florida, where alligators and humans live in close proximity, it is important to track the locations and sizes of alligators. The animals may be spotted from the air, from a boat, or on land. Wildlife experts can accurately estimate the alligator's length, but they usually want to know the animal's weight as well. That's a little harder to determine, unless you'd like to be the one who picks the alligator up to step on the scale... To develop a way to estimate the weight of an alligator, the wildlife researchers measured the lengths and weights of several captured alligators. Then they used those data to develop a model enabling them to estimate an alligator's weight from its length – something they can guess from a distance. Officials hope to use this model to identify alligators that should be relocated because they have grown so large as to pose a threat to humans. Your goal today with your partner is to help these officials model the weight of these alligators. Tasks: 1. Create the linear model for the data. 2. Discuss the accuracy of that model. 3. Try again: Create a stronger predictive model. 4. Explain why your new model is better. 5. Assess how well your model would work for these wildlife scientists. Data: Length (Inches) | Weight (pounds) 86 | 83 88 | 70 72 | 61 74 | 54 61 | 44 90 | 106 89 | 84 68 | 39 76 | 42 114 | 197 90 | 102 78 | 57 94 | 130 74 | 51 147 | 640 58 | 28 86 | 80 94 | 110 63 | 33 86 | 90 69 | 36 72 | 38 128 | 366 85 | 845 82 | 80

          Scientists collect information on many kinds
of wildlife, and for a variety of reasons.
Through their research they learn about
the animals' habits, populations, and
locations. Such information can help them
learn more about the animals, protect
endangered species, detect changes that
may signal environmental problems, or
keep track of animals that may present
risks to humans.

In central Florida, where alligators and
humans live in close proximity, it is
important to track the locations and sizes
of alligators. The animals may be spotted
from the air, from a boat, or on land.
Wildlife experts can accurately estimate the
alligator's length, but they usually want to
know the animal's weight as well. That's a
little harder to determine, unless you'd like
to be the one who picks the alligator up to
step on the scale...

To develop a way to estimate the weight
of an alligator, the wildlife researchers
measured the lengths and weights of
several captured alligators. Then they used
those data to develop a model enabling
them to estimate an alligator's weight from
its length – something they can guess from
a distance. Officials hope to use this model
to identify alligators that should be
relocated because they have grown so
large as to pose a threat to humans.

Your goal today with your partner is to
help these officials model the weight of
these alligators.

Tasks:
1. Create the linear model for the
data.
2. Discuss the accuracy of that model.
3. Try again: Create a stronger
predictive model.
4. Explain why your new model is
better.
5. Assess how well your model would
work for these wildlife scientists.

Data:
Length (Inches) | Weight (pounds)
86 | 83
88 | 70
72 | 61
74 | 54
61 | 44
90 | 106
89 | 84
68 | 39
76 | 42
114 | 197
90 | 102
78 | 57
94 | 130
74 | 51
147 | 640
58 | 28
86 | 80
94 | 110
63 | 33
86 | 90
69 | 36
72 | 38
128 | 366
85 | 845
82 | 80

Scientists collect information on many kinds
of wildlife, and for a variety of reasons.
Through their research they learn about
the animals' habits, populations, and
locations. Such information can help them
learn more about the animals, protect
endangered species, detect changes that
may signal environmental problems, or
keep track of animals that may present
risks to humans.

In central Florida, where alligators and
humans live in close proximity, it is
important to track the locations and sizes
of alligators. The animals may be spotted
from the air, from a boat, or on land.
Wildlife experts can accurately estimate the
alligator's length, but they usually want to
know the animal's weight as well. That's a
little harder to determine, unless you'd like
to be the one who picks the alligator up to
step on the scale...

To develop a way to estimate the weight
of an alligator, the wildlife researchers
measured the lengths and weights of
several captured alligators. Then they used
those data to develop a model enabling
them to estimate an alligator's weight from
its length – something they can guess from
a distance. Officials hope to use this model
to identify alligators that should be
relocated because they have grown so
large as to pose a threat to humans.

Your goal today with your partner is to
help these officials model the weight of
these alligators.

Tasks:
1. Create the linear model for the
data.
2. Discuss the accuracy of that model.
3. Try again: Create a stronger
predictive model.
4. Explain why your new model is
better.
5. Assess how well your model would
work for these wildlife scientists.

Data:
Length (Inches) | Weight (pounds)
86 | 83
88 | 70
72 | 61
74 | 54
61 | 44
90 | 106
89 | 84
68 | 39
76 | 42
114 | 197
90 | 102
78 | 57
94 | 130
74 | 51
147 | 640
58 | 28
86 | 80
94 | 110
63 | 33
86 | 90
69 | 36
72 | 38
128 | 366
85 | 845
82 | 80

Added by Joseph H.

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