It Is Known That the Variance of a Population Equals

question 92

Multiple Choice

It is known that the variance of a population equals 1,936. A random sample of 121 has been taken from the population. There is a .95 probability that the sample mean will provide a margin of error of

• A)7.84
• B)31.36
• C)344.96
• D)1,936

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Definitions:

Xylem

The tissue in plants that transports water and some nutrients from the roots to the leaves.

Bundle Scars

Marks left on the stem of a plant where vascular bundles or leaf traces have broken off or been removed.

Leaf Scar

Marks on a stem left when the petiole of a leaf breaks during abscission.

Guttation

The exudation of drops of water from the pores of plants, occurring when soil moisture levels are high, and root pressure forces water up through the plant vascular system.