Assembly line and weighs contents
A food snack manufacturer samples 7 bags of pretzels off assembly line and weighs their contents. If the sample mean is 12.7 oz. and the sample standard deviation is 0.70 oz., find the 95% confidence interval of the true mean.
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Draw 20 more samples and add 20 new x-bars to histogram in part b. Explain the distribution that seems to be developing. Use the empirical rule to test for normality. See the sampling distribution of sample means and the central limit theorem devel
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The Sample standard deviation of sample of 13 UK citizens was 3.5. At the significance level of 0.05 can we conclude that there is the difference in the variance of life expectancy of the two countries?
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