Question: (3 points) A test is carried out to see if the mean diameter of circular crawlspaces in a building is less than 18 inches. The P-value for the test turned out to be 0.4390, which was based on a sample mean of 17.91 inches. Based on this, which of the following can you conclude?

1. The mean diameter of all of the crawlspaces is definitely not 18 inches
2. There is evidence to suggest that the mean diameter is something other than 18 inches.
3. All we can say is that the mean diameter of all of the crawlspaces is less than 18 inches.
4. There is no evidence to suggest the mean diameter of all of the crawlspaces less than 18 inches.
5. I still don't know what a P-value does exactly

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