Examlex
A test of mathematical ability is given to a random sample of 10 eighth-grade students before and after they complete a semester-long basic mathematics course. The mean score before the course was 119.60, and after the course the mean score was 130.80. The standard deviation of the difference is 16.061. Calculate a 99 percent confidence interval.
Irregular Ragged
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Melanoma
A type of skin cancer that originates from melanocytes and is noted for its ability to spread rapidly to other parts of the body.
Ordinary Mole
A common small, dark spot or growth on the skin, usually benign and composed of melanocytes.
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