Given the Following Information About a Hypothesis Test of the Difference

question 30

Multiple Choice

Given the following information about a hypothesis test of the difference between two means based on independent random samples,which one of the following is the correct rejection region at a significance level of .05?
H_A: ?_A > ?_B, $\bar { X } _ { 1 } = 12$
$\bar { X } _ { 2 } = 9$
S₁ = 4,s₂ = 2,n₁ = 13,n₂ = 10.

• A)Reject H₀ if t > 1.96
• B)Reject H₀ if t > 1.645
• C)Reject H₀ if t > 1.721
• D)Reject H₀ if t > 2.08
• E)Reject H₀ if t > 1.782

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Definitions:

Vastus Lateralis

The vastus lateralis is a muscle in the thigh that is one of the components of the quadriceps femoris, involved in extending the knee and stabilizing the patella.

Epitrochlearis

A small muscle found in some animals' forearm that assists in the extension of the forearm, not consistently present in human anatomy.

Flexor Carpi Radialis

A muscle in the forearm that flexes and abducts the hand at the wrist.

Brachialis

A muscle in the upper arm that flexes the elbow, located underneath the biceps muscle.