Question by Mehmood: Required help in another Statistical related Discussion Question!? The question is When might coefficient of variation be a better measure of dispersion than variance? Till yet I have found this answer: This is useful when two distribution have significantly different means. Lets say you wanted to know if steel balls from ball [...]
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Statistics question multiple choice help please?
Question by Life Goes On: Statistics question multiple choice help please? The diameter of ball bearings is known to be normally distributed with unknown mean and variance. A random sample of size 25 gave a mean 2.5cm. The 95% confidence interval had length 4cm. Then: 1. The sample variance is 4.86 2. The sample variance [...]
