(a) At an accident black spot junction, road accidents generally occur at a rate of 5 per month, on average. After road modifications, there is 1 accident in the first month. Does this provide evidence that the modifications have reduced the risk of accidents? (b) One member of the local district council examines the detailed records, and finds that in the two months immediately before the modifications there were 10 accidents. On the basis of this information alone, with the fact that there was 1 accident in the following month, would you conclude that there has been an improvement?
(a) At an accident black spot junction, road accidents generally occur at a rate of 5 per month, on average. After road modifications, there is 1 accident in the first month. Does this provide evidence that the modifications have reduced the risk of accidents? (b) One member of the local district council examines the detailed records, and finds that in the two months immediately before the modifications there were 10 accidents. On the basis of this information alone, with the fact that there was 1 accident in the following month, would you conclude that there has been an improvement?
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter10: Sequences, Series, And Probability
Section10.2: Arithmetic Sequences
Problem 68E
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(a) At an accident black spot junction, road accidents generally occur at a rate of 5 per month,
on average. After road modifications, there is 1 accident in the first month. Does this provide
evidence that the modifications have reduced the risk of accidents?
(b) One member of the local district council examines the detailed records, and finds that in
the two months immediately before the modifications there were 10 accidents. On the basis of
this information alone, with the fact that there was 1 accident in the following month, would
you conclude that there has been an improvement?
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