A Severe Drought Affected Several Western States for 3 Years

question 8

Multiple Choice

A severe drought affected several western states for 3 years. A Christmas tree farmer is worried about thedroughtʹs effect on the size of his trees. To decide whether the growth of the trees has been retarded, the farmerdecides to take a sample of the heights of 25 trees and obtains the following results (recorded in inches) : $$\begin{array} { l l l l l l l l l l l l l } 60 & 57 & 62 & 69 & 46 & 54 & 64 & 60 & 59 & 58 & 75 & 51 & 49 \\67 & 65 & 44 & 58 & 55 & 48 & 62 & 63 & 73 & 52 & 55 & 50 &\end{array}$$ The tree farmer feels the normal height of a tree that was unaffected by the drought would be 65 inches. Findthe z-score for a tree that is 65 inches tall.

• A) z = 0.84
• B) z = 0.98
• C) z = 0.77
• D) z = 0.98.

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Definitions:

Gold Standard

A monetary system where a country's currency or paper money has a value directly linked to gold, ensuring stability in exchange rates.

U.S. Dollar

The official currency of the United States of America, commonly used worldwide as a reserve currency and standard for international trade.

Kenyan Shillings

The official currency of Kenya, which is subdivided into 100 cents.

Floating Rate System

A currency exchange regime where a country's currency value is allowed to fluctuate in response to foreign exchange market mechanisms.