3. Identify the sampling method used in each scenario: (a) In a university with multiple campuses, all professors from three campuses are surveyed to determine their opinions on the effectiveness of remote learning during the pandemic. (b) Hospital administrators are chosen using random numbers to determine their perspectives on healthcare policies. (c) Every 50th chocolate bar produced in a factory is checked for quality and consistency. (d) Employees at a tech company are divided into four groups based on their department and years of experience. Ten individuals are selected from each group and interviewed to learn about their job satisfaction. 4. The number of defective products identified by a quality control inspector during a 15-day period was recorded for a production line, Line A. The data is provided below: Line A: 8,10,12,15,17,18,18,20,22,22,24,25,27,30,45 For this production line: (a) Find the sample mean. (b) Find the standard deviation. (Construct a table like what we did in the lecture) (c) Find the mode. (d) Compute the median. (e) Compute Q1 and Q3. (f) Find the 80 th percentile. (g) Are there any suspected outliers? (h) Construct a box plot for the given data. (The plot MUST be hand made. Please do not use any software)