Questions from Statistics

Q: Describe the five basic steps in a statistical study, and give

Describe the five basic steps in a statistical study, and give an example of their application.

Q: In a test of the effectiveness of garlic for lowering cholesterol,

In a test of the effectiveness of garlic for lowering cholesterol, 47 adult subjects were treated with Garlicin, which is garlic in a processed tablet form. Cholesterol levels were measured before and...

Q: Does listening to Beethoven make teenagers more intelligent?

Does listening to Beethoven make teenagers more intelligent?

Q: Does the herb echinacea help prevent colds?

Does the herb echinacea help prevent colds?

Q: A company is developing a new battery for smartphones, and it

A company is developing a new battery for smartphones, and it is claimed that the new battery lasts significantly longer than those currently in use.

Q: Which siding lasts longer on a home: aluminum, vinyl,

Which siding lasts longer on a home: aluminum, vinyl, or wood?

Q: More than 1 million people sent texts in response to a TV

More than 1 million people sent texts in response to a TV survey question, so this survey result is clearly more valid than any survey of a few hundred people.

Q: If you use a large enough sample, it does not matter

If you use a large enough sample, it does not matter if the sample is biased, so the treatment must have practical significance.

Q: A pollster plans to improve survey results by only conducting polls in

A pollster plans to improve survey results by only conducting polls in which the margin of error is zero.

Q: My experiment proved beyond a doubt that vitamin C can reduce the

My experiment proved beyond a doubt that vitamin C can reduce the severity of colds, because I controlled the experiment carefully for every possible confounding variable.