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# sample_quiz_3 - MA 2611 D 07 Quiz 3a Solution 1(7 points A...

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MA 2611 D’ 07 Quiz 3a Solution 1. (7 points) A 99% confidence interval for a population mean is (0 . 51 , 2 . 73). This means that in 99% of all possible samples, the population mean μ will lie between 0.51 and 2.73. True or false? If false, give a correct interpretation of the confidence level. Solution: False. A correct interpretation is “In 99% of all possible samples from this population, a 99% confidence interval computed using the sample data will contain the population mean μ ”. 2. 20 tires of a new design give tread lives having a sample mean of 42,357 miles and a sample standard deviation of 3,042 miles. The data show no evidence of outliers or non-normality.
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