Question 1 Production Rates
A manufacturing company wishes to find out whether the productivity of its workforce has increased now that they have a new machine. The factory examined the records for a random sample of 8 hours over the past month. The hourly production rates for these 8 hours were:
142 175 162 158 190 154 160 185
Suppose the production rate before the use of the new machine is 150 units per hour. Test at 5% if the new machine has increased workers’ productivity on average using
(a) p-value approach, and
(b) critical value approach.
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