A Group of 59 Randomly Selected Students Have a Mean $\mu$

question 57

Multiple Choice

A group of 59 randomly selected students have a mean score of 29.5 with a standard deviation of 5.2 on a placement test. What is the 90% confidence interval for the mean score, $\mu$ , of all students taking the test?

• A) \(28.2 < \mu < 30.8\)
• B) \(28.4 < \mu < 30.6\)
• C) \(27.8 < \mu < 31.2\)
• D) \(27.9 < \mu < 31.1\)

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Definitions:

Identical Twins

Twins that result from the division of a single fertilized egg, sharing the same genetic material and typically exhibiting very similar physical and sometimes behavioral traits.

Temporary Center

A transient focal point or hub characterized by a particular activity or function, which is not permanent.

Blood Cells

Components of blood, including red cells carrying oxygen, white cells defending against infection, and platelets aiding in clotting.

Yolk Sac

One of the extraembryonic membranes; a pouchlike outgrowth of the digestive tract of embryos of certain vertebrates (e.g., birds) that grows around the yolk and digests it. Embryonic blood cells are formed in the mammalian yolk sac, which lacks yolk.