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A company offered one half of its employees a bonus if the production of light bulbs increased by 30%. The other half of the employees was not offered a bonus. As the end of the month, production in the group that did not get the bonus offer increased by a mean of 20 and production in the bonus group increased by a mean of 30.



What is the correct order of steps to determine if the results are significant?



A: Run the experiment many times.



B: Randomly separate the employees’ individual results into two groups.



C: Calculate the probability of a difference of 10.



D: Calculate the difference of the means.



E: Calculate the mean of each group.


CHOICES

a.) A, B, C, D, E


b.) A, B, C, E, D


c.) B, E, D, C, A


d.) B, E, D, A, C