The State Transportation Department Is Thinking of Changing Its Speed

question 21

Multiple Choice

The State Transportation Department is thinking of changing its speed limit signs.It is considering two new options in addition to the existing sign design.At question is whether the three sign designs will produce the same mean speed.To test this,the department has conducted a limited test in which a stretch of roadway was selected.With the original signs up,a random sample of 30 cars was selected and the speeds were measured.Then,on different days,the two new designs were installed,30 cars each day were sampled,and their speeds were recorded.Suppose that the following summary statistics were computed based on the data: Based on these sample results and significance level equal to 0.05,the sum of squares between is:

• A)approximately 3,586.
• B)approximately 2,430.
• C)approximately 1,215.
• D)None of the above.

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Definitions:

Fertile Eunuch Syndrome

A rare endocrine condition characterized by low levels of testosterone, preserved spermatogenesis, and reduced secondary sexual characteristics in males.

Lorain-Levi Short Stature

Also known as Laron Syndrome, it is a rare genetic disorder characterized by resistance to growth hormone, resulting in short stature.

Hypothalamus

A region of the brain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.

Nelson's Syndrome

A condition that occurs in some patients after the removal of the adrenal glands for Cushing's disease, characterized by the rapid growth of pituitary tumors.