Posted by Lost37 on .
the weights of shells follow a normal distribution. a random sample of 12 hybrid shells a a mean weight of 1.7 pounds with standard deviation 0.24 pounds. Find a 95 % confidence interval level for the mean weight if the fall catch is within 0.1 pounds of the sample estimate

statistics 
PsyDAG,
95% = mean ± 1.96 SEm
SEm = SD/√n