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August 4, 2015

Homework Help: statistics

Posted by rose on Monday, November 23, 2009 at 5:03pm.

How do you solve this problem? physical therapy reported that it has been estimated that 80 percent of all lower back pain cases are caused by weak trunk muscles. if 15 patients with lower back pain are examined, what's the probability that

1. exactly 10 have pain caused by weak trunk muscles

2. more than 8 have pain caused by weak trunk muscles

3. fewer than 6 have pain caused by weak trunk muscles

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