at least one culdesac 2 What proportion of these subdivision

at least one cul-de-sac    

2. What proportion of these subdivisions had at most five intersections? Fewer than five intersections? (Round your answers to three decimal places.)

1. no culs-de-sac
at least one cul-de-sac     2. What proportion of these subdivisions had at most five intersections? Fewer than five intersections? (Round your answers to three decimal places.) at most fiver intersections     fewer than five intersections

The article \"Determination of Most Representative Subdivision\"T gave data on various characteristics of subdivisions that could be used in deciding whether to provide electrical power using overhead lines or underground lines. Here are the values of the variables y = number of culs-de-sac and z = number of intersections: y1 0 1 o 0 2 0 1 1 1 2 10 01 1 0 11 1 1 0 o o y 1 0 1002011 12100110111100 0 Z 1 8 611 5 3 004 400 1 2 1 4040 30 11 y1 120 1 22110 2 11015 0301100 y11 201 2 2110211015 0301 10 0 z 0 z 0 1 3 246 6011 83350 5 2 31 0003

Solution

1.

There are 17 OUT OF THESE 47 with 0 culs de sac.

P(no culs de sac) = 17/47 = 0.361702128 [ANSWER]

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P(at least one cul de sac) = 1 -P(no culs de sac) = 0.638297872 [ANSWER]

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2.

There are 42 out of 47 with at most 5 intersections.

P(at most 5 int) = 42/47 = 0.893617021 [ANSWER]

There are 39 out of 47 with at most 5 intersections.

P(fewewr than 5 int) = 39/47 = 0.829787234 [ANSWER]