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In a random sample of 17 senior-level chemical engineers, the mean annual earnings was 123950 and...

In a random sample of 17 senior-level chemical engineers, the mean annual earnings was 123950 and the standard deviation was 34940. Assume the annual earnings are normally distributed and construct a 95% confidence interval for the population mean annual earnings for senior-level chemical engineers.

1. The critical value:

2. The standard error of the sample mean:

3. The margin of error:

4. The lower limit of the interval:

5. The upper limit of the interval:

Math   Statistics-And-Probability   
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