Exhibit 7-3 in a Local University, 40% of the Students Live in Live

question 78

Multiple Choice

Exhibit 7-3
In a local university, 40% of the students live in the dormitories. A random sample of 80 students is selected for a particular study.
-Refer to Exhibit 7-3. The probability that the sample proportion (the proportion living in the dormitories) is between 0.30 and 0.50 is

• A)0.4664
• B)0.9328
• C)0.0336
• D)0.0672

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Definitions:

Stele

The cylinder in the center of roots and stems that contains the vascular tissue; also called vascular cylinder.

Pericycle

A layer of cells found just inside the endodermis in plant roots, involved in the formation of lateral roots and secondary growth.

Endodermis

The innermost layer of cells in the root cortex, serving as a selective barrier that regulates the passage of substances from the soil into the vascular cylinder.

Pericycle

A layer of cells just inside the endodermis in plant roots, which can give rise to lateral roots, contributing to the plant's growth and development.