Suppose the weight of new born baby is approximately normally distributed with a mean of 4.70 pounds and a standard deviation of 0.40 pounds in Cambodia. Assume that a sample of 25 new born babies is selected:   What is the probability that the sample mean will be at least 4.60 pounds?     Between what two values symmetrically distributed around the population mean will 70% of the sample mean fall?

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.