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Statistics / Elementary Statistics: A Step by Step Approach 8th ed. 8 / Chapter 8-2 / Problem 12

Elementary Statistics: A Step by Step Approach 8th ed. | 8th Edition | ISBN: 9780073386102 | Authors: Allan G Bluman Professor Emeritus

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Student Expenditures The average expenditure per student

Chapter 8, Problem 12

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QUESTION:

Student Expenditures The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10,798. Do these results indicate that the average expenditure has changed? Choose your own level of significance. Source: World Almanac.

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QUESTION:

Student Expenditures The average expenditure per student (based on average daily attendance) for a certain school year was $10,337 with a population standard deviation of $1560. A survey for the next school year of 150 randomly selected students resulted in a sample mean of $10,798. Do these results indicate that the average expenditure has changed? Choose your own level of significance. Source: World Almanac.

ANSWER:

At the 5% level of significance, the results indicate that the average expenditure has changed. To confirm this, a two-tailed t-test can be perform

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