Exam1Sp02b

# Exam1Sp02b - COURSE MSCI 3710 Exam 1 Version B Spring 2002...

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Use the paragraph below to answer the next six questions (Kvanli Chapter 8). The Caribbean boasts of inexpensive weddings. From past data, the average cost of a wedding is known to be \$7400, with a standard deviation of \$1050. To test if the true mean costs have changed, a random sample of 30 current weddings is taken. Their average is \$7720. Is there evidence that currently, the true mean cost of wedding differs from the usual \$7400? Perform the test at a= 0.05. 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: a = 7720 Ha: a a7720 B. Ho: a a 7720 Ha: a < 7720 C. Ho: a = 7400 Ha: a a 7400 * D. Ho: a > 7400 Ha: a a 7400 E. Ho: a = 7400 Ha: a <7400
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