A Large University Is Interested in Learning About the Average

question 2

Multiple Choice

A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent traveling to campus. This variable, travel time, was then used conduct a test of hypothesis. The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Suppose the sample mean and sample standard deviation were calculated to be 23.2 and 20.26 minutes, respectively. Calculate the value of the test statistic to be used in the test.

• A) z = 2.437
• B) z = 37.59
• C) z = 0.173
• D) z = 2.551

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Definitions:

Circular Runout

Circular runout is a tolerance specified on cylindrical parts to control the amount of variation or wobbles as the part rotates around a datum axis.

Right Angles

Describes an angle of 90 degrees, representing the intersection at which two lines or planes meet to form a perfect corner.

Circular Elements

Components or parts of a design characterized by their round shape, important in various engineering and architectural constructs.

Circular Runout

A geometric dimensioning and tolerancing (GD&T) term that refers to the variation of a feature's surface as it is rotated around a datum axis.