Ex1-3710[B].Fall00

# Ex1-3710[B].Fall00 - COURSE MSCI 3710 EXAM 1 Version B...

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COURSE: MSCI 3710 Print Name: EXAM 1 Signature: Version B S.S.#: SEMESTER: Fall 2000 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.

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Use the information given in the paragraph below to answer the next three questions. The director of research and development is testing a new drug. She wants to know if there is evidence at the 0.05 level that the drug stays in the system for less than 483 minutes. After sampling 40 patients, the drug has been found to stay in the blood system for an average of 490 minutes with a variance of 484. 1. What are the null hypothesis and alternative hypothesis for this test? A. Ho: µ = 483 Ha: µ ≠483 B. Ho: µ ≥ 483 Ha: µ < 483* C. Ho: µ = 490 Ha: µ ≠490 D. Ho: µ > 483 Ha: µ ≠483 E. Ho: µ ≥ 490 Ha: µ < 490 2. What is the calculated value of the test statistic? A. Z = 2.01* B. Z = 1.65 C. Z = -2.01 D. Z = 0.09 E. Z = 3.48 3. Assuming the calculated value of the test statistic is -2.65 , what are the decision and conclusion of the test? A. Fail to reject the null hypothesis, there is overwhelming evidence that Ha is true because p-value is less than the level of significance B. Fail to reject the null hypothesis, there is insufficient evidence that Ha is true because p- value is greater than the level of significance C. Reject the null hypothesis, there is evidence that Ha is true because p-value is less than the level of significance* D. Fail to reject the null hypothesis, there is insufficient evidence that Ha is true because p- value is less than the level of significance E. Reject the null hypothesis, there is sufficient evidence that Ha is true because p-value is greater than the level of significance
Use the information given in the paragraph below to answer the next two questions A manufacturer of jackfruit chips would like to know its bag filling machine works correctly at the 545gram setting. Based on a 21 bag sample where the average is 538 grams and the variance is 784 grams, is there sufficient evidence at the 0.1 level that their bags are overfilled ? 4. What is the calculated value of the test statistic? A. t* = -1.15* B. t* = -0.04 C. t* = 0.04 D. t* = 1.15 E. t* = 1.32 5. What is the decision rule for this test? A. Reject Ho if t* > 1.282 ∣ ∣ B. Fail to reject Ho if t* > 1.323 ∣ ∣ C. Reject Ho if t* > 1.725 ∣ ∣ D. Reject Ho if t* < 1.325 E. Reject Ho if t* > 1.325* ∣ ∣ Use the following information to answer the next four questions ( Kvanli Chapter 9). The nicotine content of two brands of cigarettes is being measured for the purpose of testing at a

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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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Ex1-3710[B].Fall00 - COURSE MSCI 3710 EXAM 1 Version B...

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