3 1 3 Question 2: (10 points) Consider below table which shows distribution of daily wages of 40 workers of a factory class AB CD GH midpoint 17 17 22 Frequency 15 10 9 2) If all the classes' have width is equal find the class width and classes boundary. (5 points) b) Find the mean and standard deviation. (5 points) Question 3 (13 points) 1. A random sample of size 20 is taken from a population of 100 members. The sample mean is 20.0105 and the Sample variance is 0.0035. Construct a 95% confidence interval to estimate the population mean (points)