The graph shows the nonzero portion of a probability density function. If a = 13.8, b = 38.9, and c= 43.9, what must be the value of h? fx(x) 4 h a

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Chapter1: Combinatorial Analysis
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The graph shows the nonzero portion of a probability density function. If a = 13.8, b = 38.9, and c= 43.9, what must be the value of h?
fx(x) A
h
a
b
Transcribed Image Text:The graph shows the nonzero portion of a probability density function. If a = 13.8, b = 38.9, and c= 43.9, what must be the value of h? fx(x) A h a b
QUESTION 1
Which of the following is the best example of a discrete random variable?
yield strength of A36 steel, in kip/in?
compressive strength of concrete cylinders, in Ib/in2
heaviest truck that crosses a bridge each hour, in kips
daily average wind speed, in miles per hour
wind direction, rounded to the nearest 45°
total monthly rainfall, in inches
Imaximum ground acceleration measured each year, in ft/s?
O air temperature, in °F
QUESTION 2
For a certain random variable X, it is known that P(X < 639) = 0.86 and P(X > 90) = 0.22. what is P(90 < X < 639)?
Transcribed Image Text:QUESTION 1 Which of the following is the best example of a discrete random variable? yield strength of A36 steel, in kip/in? compressive strength of concrete cylinders, in Ib/in2 heaviest truck that crosses a bridge each hour, in kips daily average wind speed, in miles per hour wind direction, rounded to the nearest 45° total monthly rainfall, in inches Imaximum ground acceleration measured each year, in ft/s? O air temperature, in °F QUESTION 2 For a certain random variable X, it is known that P(X < 639) = 0.86 and P(X > 90) = 0.22. what is P(90 < X < 639)?
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