Problems 1,2,3, and 4

Act #8: What's the Estimate? 1. Write a statement that correctly interprets the following 95% confidence intervals: 8) b) 2. A random sample of 94 light bulbs had a mean life of hours with a standard deviation of hours. Construct a 90% confidence interval (CI) and margin of error (ME) for the mean life of all light bulbs of this type. 3. A sample of 60 faculty members at a large university found that their average taxes were $500 a month, with a standard deviation of $35. What is the 90% confidence interval (CI) and margin of error (ME) of the average taxes of all faculty members at the university? 4. Construct the 95% confidence interval (CI) and margin of error (M E) when given sample size , sample mean , and standard deviation