The average expenditure per student (based on average daily attendance) for a ce

Question

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 148 randomly selected students resulted in a sample mean of $10, 520. Do these results indicate that the average expenditure has changed? Use a = 0.10. Source World Almanac. State the hypotheses and identify the claim with the correct hypothesis. H_0: mu $10337 H_1: mu $10337 This hypothesis is a test. Find the value(s). Enter the values in ascending order and round the answer to two decimal places. Critical values are and

Explanation / Answer

= 0.10.

So, it means that confidence interval is 90%

Thus, critical values are + 1.645 (SD)

+ 1.645 (SD) = 10337 + 1.645(1560/sqrt(148)) = 10337 + 210.94 = 10547.94

- 1.645 (SD) = 10337 - 1.645(1560/sqrt(148)) = 10337 - 210.94 = 10126.06

Critical values are 10126.06 and 10547.94

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