The local supermarket is planning to fit a recycling centre in its car park. The plan that they are looking at is on a scale of 1:200.
On the plans, the recycling centre measures 5cm by 2 cm.
How big will it be in real life?
5 cm by 400 cm
1,000 cm by 400 cm
100 cm by 40 cm
500 cm by 400 cm

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

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.