SOLUTION: can someone tell me if i did this correctly? The mean weights of Santee Cooper catfish are 12.3 pounds. A random sample of 25 catfish is drawn from this population. what is the p
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Question 323291: can someone tell me if i did this correctly? The mean weights of Santee Cooper catfish are 12.3 pounds. A random sample of 25 catfish is drawn from this population. what is the probability that the mean weight of the sample is less than 11.9 pounds? assume stand dev=1.2 pounds
this is what i did...z=(11.9-12.3)/1.2/sqroot25=-.067 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! z=(11.9-12.3)/1.2/sqroot25=-.067
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Should be: -0.4/[1.2/5] = -0.4/0.25 = -1.6667..
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The P(x < 11.9) = P(z < -1.6667) = normalcdf(-1000,-1.6667) = 0.0478
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Cheers,
Stan H.
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