The diameter of ball bearing is known to be normally distributed with unknown mean and variance. A random sample of size 25 gave mean 2.5 cm. The 95% confidence interval had length 4 cm. Then (a) the sample variance is
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You want to estimate the mean SAT score for a population of students with a ... The diameter of ball bearings is known to be Normally distributed with unknown ... variance. A random sample of size 25 gave a mean of 2.5 cm. The 95% ... length 4 cm. ... A 95% confidence interval for the mean reading achievement score for a ...
The diameter of ball bearing is known to be normally ...
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