Two independent simple random samples are taken to test the difference between the means of two populations whose standard deviations are not known, but are assumed to be equal. The sample sizes are n1 = 25 and n2 = 35 . The correct distribution to use is the
a. t distribution with 61 degrees of freedom.
b. t distribution with 60 degrees of freedom.
c. t distribution with 59 degrees of freedom.
d. t distribution with 58 degrees of freedom.
Question 2
When there is probabilistic demand in a multi-period model, the inventory level will not decrease smoothly and can fall below 0.
a. True
b. False
Indicate whether the statement is true or false
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Pulmonary function test: spirometry. (a) Normal respiratory volumes, as measured during spirometry.
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