Cloud-seeding is a technique for creating rain. Certain chemicals (in this experiment, silver iodide) can be sprayed into clouds, increasing the amount of rain. But does it work? Two sets of clouds were tested, one group was seeded and the other group was not. Click the links below to find out more.

• cloud seeding video:[LINK]
• Link to more information about the experiment: [LINK]
• raw data: [LINK]

Copy and paste the raw data to Statcrunch, analyze the data, then report it (based on the results of the experiment) in the textbox below. Imagine you are writing the report for a government agency that is investigating cloud-seeding. The report should address the question: is cloud seeding with silver iodide an effective way to increase the amount of rainfall? The report should include...

1. a comparison of the amounts of rain produced by the unseeded clouds and seeded clouds. Compare the center, shape and spread
2. histograms and/or boxplots (you decide which type of graph is more useful in this situation) in your answer. Take screenshots from Statcrunch. (command+shift+4 for apple, window+shift+S for PCs) and copy/paste them in the textbox below.
3. summary statistics
4. your conclusion, based on the results of this experiment and your analysis of the data: does cloud-seeding with silver iodide increase the amount of rain?

Limit the scope of your report to the data from this experiment. You do not have to weigh pros and cons, consider cost, environmental effects, etc.

Raw data