You Are Attempting to Link Weekly Hours of Exercise (X)

question 49

Multiple Choice

You are attempting to link weekly hours of exercise (x) to blood pressure (y) using simple linear regression and the following data: In applying the least squares criterion, the slope (b) and the intercept (a) for the best-fitting line are b = -4 and a = 90.Produce the 95% confidence interval estimate of expected blood pressure when weekly exercise is 5 hours (that is, for x = 5) and report the upper bound for the interval.

• A)85.6
• B)70.0
• C)111.8
• D)93.2
• E)78.3

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Definitions:

Amplitude

Amplitude refers to the maximum extent of a vibration or oscillation, measured from the position of equilibrium.

Weber's Law

A principle stating that the change in a stimulus that will be just noticeable is a constant ratio of the original stimulus.

Just Noticeable Difference

The minimal change in a stimulus that can just barely be detected by an organism.

Absolute Threshold

The lowest level of stimulation that a person can consciously detect 50 percent of the time the stimulation is present.