topic: estimation parameter: Understanding Confidence Interval Estimates for the Population Mean

EVALUATION: A random selection of 40 entering Mathematics majors has the following GPAs. Assume that o = 0.46. Estimate the true mean GPA with 99% confidence level. Supply answers in the Solution Column. 4.0 3.5 3.0 3.3 3.8 3.1 3.6 4.0 3.9 3.5 3.2 3.0 3.5 3.2 3.0 3.2 4.0 3.0 3.4 3.0 3.0 2.8 5.6 3.0 3.2 3.5 3.2 2.8 3.3 3.1 3.2 2.9 3.0 2.8 4.0 3.7 3.0 3.3 3.2 2.8 1. Describe the population parameter of interest. 2. Checking the assumptions 3. Test statistics to be used 4. Confidence Level 5. Solve for the other information needed & identify other given. 6. What is the point estimate? 7. Determine the confidence coefficient 8. Compute for the lower and upper confidence limit using the formula. 9. What is the maximum error E? 10. Conclusion 11. Draw the normal curve labelling the results of your answers