MS 1023: Business Statistics with Computer Applications I Fall 2015 Quiz 16 Name: Solutions Student ID: Use the following scenario and data for all the questions A survey of data base administrators is conducted. In a random sample of n 150 , x 63 of them were found to have over 10 years of experience. Construct a 1 0.90 confidence interval for the population proportion p of data base administrators with over 10 years of experience. 1. The sample proportion of data base administrators having over 10 years of experiences is closest to (A) 63 2. (E) none of the above (B) 0.0403 (C) 0.0663 (D) 0.0790 (E) none of the above (B) 0.4863 (C) 0.3537 (D) 0. 3410 (B) 0.4863 (C) 0.3537 (D) 0. 3410 The conclusion is (A) With 90% confidence, (B) With 90% confidence, (C) With 90% confidence, (D) With 90% confidence, (E) none of the above 0.3410 0.3537 0.3410 0.3537 p 0.4863 p 0.4990 p 0.4990 p 0.4863 1 (E) none of the above The Right limit R of this confidence interval is closest to (A) 0.4990 5. (D) 42 The left limit L of this confidence interval is closest to (A) 0.4990 4. (C) 4.2 The half width of this confidence interval is closest to (A) 0.0033 3. (B) 1.645 (E) none of the above