quiz6_key

# quiz6_key - Answer SE ¯ y = s √ n = 1 43 √ 5 = 0 64...

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NAME: Stat 205 Quiz 6 1. (5 points) A batch of alfalfa was dried, ground up, and passed through a ﬁne screen. Five small (0.3 g) aliquots of the alfalfa were analyzed for their content of insoluble ash. The results (g/kg) are 10 . 0 8 . 9 9 . 1 11 . 7 7 . 9 . For these data, the sample mean is 9.52 g/kg and the sample standard deviation is 1.43 g/kg. Calculate the standard error of the mean.
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Unformatted text preview: Answer: SE ¯ y = s √ n = 1 . 43 √ 5 = 0 . 64 g/kg . 2. (5 points) Consider taking a random sample of size n = 4 from from a population of persons who smoke and recording how many of them, if any, have lung cancer. What are the possible values of the sampling distribution of the sample proportion ˆ p ? Answer: 4 , 1 4 , 2 4 , 3 4 , 4 4 ....
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