[All Steps] Suppose a friend tells you the average length of trout caught is mu=19 inches. However the creel survey reported that for a random sample of 51


Question: Suppose a friend tells you the average length of trout caught is mu=19 inches.  However the creel survey reported that for a random sample of 51 fish caught, the mean length was mean = 18.5 inches with estimated standard deviation s=3.2 inches.  Do these data indicate that the average length of trout caught in pyramid lake is less than mu= 19 inches? Use sigma=0.05.

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