ANSWER WITH SOLUTION

What Have I Learned So Far? Read and analyze each question. Write your answers on a separate sheet of paper. 1. Compare and contrast the t-distribution from the z-distribution. 2 Observe that the arbitrary cutoff point of n = 30 is used to distinguish between large and small samples. Explain why n 2 30 is selected as the arbitrary cutoff. 3. Using table 10.1, determine the t-value to be used to construct a 90% confidence interval for the population mean based on a sample of n = 14. 4. Use the table for f-distribution to determine the value of t to construct a confidence interval for a population mean for each of the following combinations of confidence coefficients and sample size: a. Confidence coefficient: 0.99, n = 18 b. Confidence coefficient: 0.90, n = 15 c. Confidence coefficient: 0.95, n1 = 25 d. Confidence coefficient: 0.95, n = 23 e. Confidence coefficient; 0.90, n = 10