Entered continuous x 7.8 0.0427 Answer Preview continuous 7.8 1-0.957 At least o

Question

Entered continuous x 7.8 0.0427 Answer Preview continuous 7.8 1-0.957 At least one of the answers above is NOT correct 2 of the questions remain unanswered 8.8 inches and 1.7 inches. (1 pt) The length, X, of a fish from a particular mountain lake in Idaho is normally distributed with ? (a) Is X a discrete or continuous random variable? (Type: DISCRETE or CONTINUOUS) ANSWER continuous (b) Write the event "a fish chosen has a length equal to 7.8 inches" in terms of X x 7.8 (c) Find the probablity of this event (d) Find the probability that the length of a chosen fish was greater than 11.8 inches: (e) Find the probability that the length of a chosen fish was between 7.8 and 11.8 inches

Explanation / Answer

Ans:

a)continuous

b)x=7.8

c)P(x=7.8)=normdist(7.8,8.8,1.7,false)=0.1974

d)

z=(11.8-8.8)/1.7=1.765

P(z>1.765)=0.0388

e)

z=(7.8-8.8)/1.7=-0.588

P(-0.588<z<1.765)=P(z<1.765)-P(z<-0.588)

=0.9612-0.2782=0.6830

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