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s2000exam1verd

# s2000exam1verd - COURSE MSCI 3710 Exam 1 Version D Spring...

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A lumber company is making boards that are specified to be 250 centimeters tall and a population variance of 169 centimeters. If the boards are too long they must be trimmed, and if they are too short they cannot be used. A sample of 35 boards is made, and it is found that they average 246 centimeters. Is there evidence at the 0.01 significance level that the boards are too short or too long? 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: l = 250 Ha: l <250 B. Ho: l = 250 Ha: l l g 250 * C. Ho: l > 250 Ha: l l l 250 D. Ho: l = 246 Ha: l l 246 E. Ho: l l 246 Ha: l < 246 2. The appropriate test statistic for testing the hypothesis as defined in question #1 is
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