In your own word explain why parameter is fixed and statistic varies

The parameter comes from the population, and the population is set. The statistic comes from the sample, and multiple samples can be taken from a population, therefore it can vary.

Step-by-step explanation:

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0

its 50 miles away from the starting point