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SOLVED: Exercise I:The following data shows birthweights (oz) from seven consecutive deliveries at the John Hopkins Hospital in April 2007:121 138 132 158 164 1461) Calculate the sample mean and sample standard deviation.2) Calculate the standard error of the mean.3) How many individuals would you need to study to decrease the standard error of the mean to 4.52?A study shows that the average of birthweights is 1402. Find t-stat and test if the above sample differs significantly from the populati