Which type of hypothesis test is most appropriate to use?A. One mean, sigma knownB. One mean, sigma unknown C.Mean of differences, using dependent samples (paired data)D. Difference of two means, using independent samplesE. ANOVA

A manager wants to try to improve the employee productivity in his company. This year, he implements a new procedure that he hopes will increase productivity. He knew that last year employees used to complete a daily average of 8.5 tasks. After implementing the new procedure this year, he collects a random sample of employees and records how many tasks they finish during a day