Exam1Sp02c

# Exam1Sp02c - COURSE MSCI 3710 Exam 1 Version C Spring 2002 Instructions n a a PRINT Name Signature Student ID Seat Number Please PRINT your name

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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 \$7500, with a standard deviation of \$975. To test if the true mean costs have changed, a random sample of 36 current weddings is taken. Their average is \$7750. Is there evidence that currently, the true mean cost of wedding differs from the usual \$7500? Perform the test at a = 0.10. 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: a = 7750 Ha: a a7750 B. Ho: a a 7750 Ha: a < 7750 C. Ho: a = 7500 Ha: a a 7500 * D. Ho: a > 7500 Ha: a a 7500 E. Ho: a = 7500 Ha: a <7500 2. The appropriate test statistic for testing the above hypothesis is: A. Z because the population standard deviation is known* B. t because the sample standard deviation was calculated C. t because the sample size is small D. Z because the sample variance was provided E. F because we do not know the equality of the variance 3. What is the calculated value of the test statistic? A. - 0.45
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## This note was uploaded on 03/09/2011 for the course DSC 3710 taught by Professor Staff during the Spring '09 term at North Texas.

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Exam1Sp02c - COURSE MSCI 3710 Exam 1 Version C Spring 2002 Instructions n a a PRINT Name Signature Student ID Seat Number Please PRINT your name

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