Answer:
a) 7/2
b) 2.0207
c) 2/7
d) 0.2687
e) 0.0629
Explanation:
the distribution between 0 to 7
a = 0, b = 7
a) μ = (a + b)/2 = (0 + 7)/2 = 7/2
b) σ = sqrt((7 - 0)^2/12) = 2.0207
c) P(x > 5 mins) = (7 - 5)/7 = 2/7
d) waited for 0.3 mins
f(x) =
= 1/6.7
P ( 1.7 < x < 3.5) = (3.5 - 1.7)(1/6.7) = 0.2687
e) P(x < k) = (k-0)(1/7) = 0.44
0.44/7 = 0.0629