For the observations 21 36 42 24 25 36 35 49 32 verify that

Question

1. For the frequencies f1 = 12, f2 = 18, f3 = 15, f4 = 10, f5 = 8, and f6 = 5, verify that the sample mean is 3.

2. For the observations
21, 36, 42, 24, 25, 36, 35, 49, 32
verify that the sample variance and the sample Winsorized variance are s² = 81 and S_w² = 51.4, respectively.