A Researcher Wishes to Determine the Difference in Two Population

question 30

Multiple Choice

A researcher wishes to determine the difference in two population means.To do this, she randomly samples 9 items from each population and computes a 90% confidence interval.The sample from the first population produces a mean of 780 with a standard deviation of 240.The sample from the second population produces a mean of 890 with a standard deviation of 280.Assume that the values are normally distributed in each population.The t value used for this is ___.

• A)1.860
• B)1.734
• C)1.746
• D)1.337
• E)2.342

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Definitions:

Muscle Bellies

The central, fleshy, contractile parts of muscle tissue that swell during contraction and are responsible for generating force.

Trapezius

A large triangular muscle extending over the back of the neck and shoulders, responsible for moving the scapulae and supporting the arm.

Latissimus Dorsi

A large, flat muscle on the back that helps control the movement of the shoulder.

Epicranius

A muscle of the scalp consisting of the frontalis and occipitalis muscles which are connected by the epicranial aponeurosis.