Question

1. A national food processor is studying two meat additives to determine if they differ on the mean amount of time (in hours) that it takes for the meat to spoil.

   They are particularly interested in how effective the additive is on ribeye steaks. Suppose 16 ribeye cuts are treated with additive A and 16 are treated with additive B, and a hypothesis test will be conducted at the 0.01 level of significance under the assumption of that the population standard deviations are not equal (Case 2). The standard deviation for Group 1 (A) is 2.1 and the standard deviation for Group 2 (B) is 1.5. Use the following website to calculate the degrees of freedom, v: http://web.utk.edu/~cwiek/TwoSampleDoF

   Which of the following would indicate the boundary or boundaries for the rejection region. Select all that apply!

   		all values of t > 2.750
   		all values of t < -2.771
   		all values of t > 1.96
   		all values of t > 1.645
   		all values of t < 1.96
   		all values of t < -2.750
   		all values of t > 2.771

Answer 1

df = 27 ( used technology provided).

all values of t < -2.771

all values of t > 2.771