What is the relationship between the interval estimates and the level of confidence?

4. Using the Salary Data Set and assuming that the salary data is a random sample from the population of salaries from the multi-national company estimate the mean salary for company executives using confidence intervals. Provide following information:

a. The 90% confidence level

b. The 95% confidence level and one at

c. The 99% confidence level.

d. What is the relationship between the interval estimates and the level of confidence?

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