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**mathizfun** Hello all--I am having trouble with this question--I feel I understand the concept, but I keep getting a test (z) statistic above 12, which seems way too high. Help??

The average number of employees in medium sized US businesses (population) is 110. A business administrator at a certain business claims that the average number is different from 110. A random of 40 business were chosen. The sample mean score was 130 and population standard deviation is 10. Is there sufficient evidence to support the business administrator’s claim? Take alpha =.05 and use (+/-) 1.96 as the critical value.

1 Determine the test statistic for the test. Round to the nearest hundredth.

2 Should the null hypothesis be accepted or rejected?

3 Is the test statistically significant? Provide your rationale for the conclusion.