Question 1 1a) For a normal population with the known variance ? what value of confidence level gives Zo/2 equal to 1.08? 1b)A random sample has been taken from a normal distribution and the following confidence intervals constructed using the same data: (25.53, 37.87) and (23.59, 39.81). (i) What is the value of the sample mean? (ii) One of these intervals is a 99% confidence interval and the other is a 95% confidence interval. Which one is the 95% confidence interval? To Submit: 1. Type your final answers in the box(es) below. 2. Show me your work on new 1 page of paper by showing it clearly to the webcam for 3 seconds 3. After this quiz is submitted. Upload a photo of this scratch paper to Part B. Answers Answerla: Write the confidence level in percentages. Answer1b(i): Write the mean value in two decimal place Answer1b(ii): Write 'first' or 'second