Anybody would explain to me how to solve this problem and what would be the answer for it and you

Which data set has a greater spread? why? set a: {38, 12, 23, 48, 55, 16, 18} set b: {44, 13, 24, 12, 56} has a greater spread because .

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i

If you flip a coin 3 times, what is the probability of flipping heads 3 times? a. p(3 heads) = 3/8 b. p(3 heads) = 1/6 c. p(3 heads) = 1/8 d. p(3 heads) = 1/2