f98exm3d

# f98exm3d - COURSE MSCI 3710 EXAM 3 Version D SEMESTER Fall...

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COURSE: MSCI 3710 Print Name: EXAM 3 Signature: Version D S.S.#: SEMESTER: Fall 1998 Seat Number: Note: Whenever question(s) are connected you may be asked to assume a result (given a value) from the previous question but this result may or may not be correct. This is to prevent you from losing points on a second question because you made a mistake on a previous question. Use the information in the paragraph below to answer the next four questions. A record company wanted to survey its customers regarding music preferences. A random

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sample of 258 frequent customers of the record company was selected, and information was gathered on their music preference and job classification. Cross-tabulation Table Calculation of Chi-Square Test OBSERVED DESCRIPTION VALUE Job Class Country Rock Classical Jazz Total χ 2 * 0.1097 Clerical 25 33 20 9 87 p-value xxxxxxxx Managerial 26 36 21 10 93 Critical value 10.6446 Blue Collar 22 29 19 8 78 α 0.1 Total 73 98 60 27 258 df 6 EXPECTED Job Class Country Rock Classical Jazz Total Clerical 24.616 33.047 20.233 9.105 87 Managerial 26.314 35.326 21.628 9.733 93 Blue Collar 22.070 29.628 18.140 8.163 78 Total 73 98 60 27 258 1. What null hypothesis would you use to test whether there is a relationship between type of music preferred and job classification? A. Ho: Each of the four types of music is the same. B. Ho: The type of music is dependent upon the job classification. C. Ho: The three job classifications prefer a different type of music. D. Ho: The job classification is independent of the type of music. E. Ho: The job classifications are not homogeneous with respect to the four types of music. 2. What is the value of the test statistic to conduct the test in question #1? A. 258 B. 10.644 C. 0.1097 D. 6.00 E. 0.10
3. Based on the computer output given above, what is the conclusion of the test in question #1 at the 10% significance level? A. There is insufficient evidence that job classification and type of music are dependent. B. There is sufficient evidence that job classification and type of music are dependent. C.

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## This note was uploaded on 03/09/2011 for the course DSCI 3710 taught by Professor Dr.jay during the Spring '08 term at North Texas.

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f98exm3d - COURSE MSCI 3710 EXAM 3 Version D SEMESTER Fall...

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