A mountain climber

A mountain climber plans to buy some rope to use as lifeline. Which of the following would be the better choice? Explain your choice.
Rope A: Mean breaking strength:500lb; standard deviation of 100lb
Rope B: Mean breaking strength: 500lb; standard deviation of 10lb

Result

x = (Correct answer is: B) Wrong answer

Step-by-step explanation:

m1=500 lb s1=100 lb  m2=500 lb s2=10 lb  p1=p(N,m1,s1,x<490)=0.4602 p2=p(N,m2,s2,x<490)=0.1587  p1>p2  x=B



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Showing 2 comments:
#
Dr Math

10 months ago  1 Like
#
Math student
which would you expect to be larger, the standard deviation of 5 random numbers picked from 1 to 47 in the california super lotto, or the standard deviation of 5 random numbers picked from 1 to 69 in the multi state powerball lottery?

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