# Question

You have been trying to control the weight of a chocolate and peanut butter candy bar by intervening in the production process. Table 5.5.4 shows the weights of two representative samples of candy bars from the day’s production, one taken before and the other taken after your intervention.
a. Find the average weight of the candy bars before intervention.
b. Find the standard deviation of the weights before intervention.
c. Find the average weight of the candy bars after intervention.
d. Find the standard deviation of the weights after intervention.
e. Compare the standard deviations before and after your intervention, and write a paragraph summarizing what you find. In particular, have you been successful in reducing the variability in this production process?

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