caps lock shift FALL 2021 ECO250 fn co Question 3 (70 points): I sampled 9 companies and recorded the number of employees that are infected by the Coronavirus. The numbers I got are 0, 1, 2, 2, 4, 4 5, 8, 10 a) Find the sample mean 1 = 4 b) Find the sample variance 0-52 ( 1 ) E (xi - c ) 2 c) Find the median In-1 = 10.75, Median = 4 d) Find the mode(s) Mode(s) = 2and 4 e) What is the scale of the variable "infected employees"? Scale is Ratio f) Find the 69th percentile 4 + 0.52 / 5- 4 r = (n- 1 ) X P + 1 4 + - 52 10 0 (9-1) x69 + 1 = 68:52 100 = 4+.52( 5-4) = 452 69th percentile = 4.52 g) If you randomly pick 2 of the 9 companies, what is the chance that together they have 9 infected employees? KE list them Randomly Picked 2 = 9 02 / 36 2 . 25 657 P(9 together) = 0-25=25/ CO