Referenced from lesson Randomness and Sample Size (Spring, 2021)

1 Evaluate the `big-animals-table` in the Interactions Area. This is the complete population of animals from the shelter! Below is a true statement about that population:

The population is 47.7% fixed and 52.3% unfixed.

Type each of the following lines into the Interactions Area and hit â€œEnter".

``````random-rows(big-animals-table, 10)
random-rows(big-animals-table, 40)``````

2 What do you get?

3 What is the contract for `random-rows`?

4 What does the `random-rows` function do?

5 In the Definitions Area, define `small-sample` and `large-sample` to be these two random samples.

6 Make a `pie-chart` for the animals in each sample, showing percentages of fixed and unfixed.

• The percentage of fixed animals in the entire populations is 47.7%.

• The percentage of fixed animals in `small-sample` is .

• The percentage of fixed animals in `large-sample` is .

7 Make a `pie-chart` for the animals in each sample, showing percentages for each species.

• The percentage of tarantulas in the entire population is roughly 5%.

• The percentage of tarantulas in `small-sample` is .

• The percentage of tarantulas in `large-sample` is .

8 Click "Run" to direct the computer to generate a different set of random samples of these sizes. Make a new `pie-chart` for each sample, showing percentages for each species.

• The percentage of tarantulas in the entire population is roughly 5%.

• The percentage of tarantulas in `small-sample` is .

• The percentage of tarantulas in `large-sample` is .

9 Which repeated sample gave us a more accurate inference about the whole population? Why?

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