Consider a Set of 50 Measurements with Mean 50

question 18

Multiple Choice

Consider a set of 50 measurements with mean 50.2 and standard deviation 18.7 and with the following observed frequencies. It is desired to test whether these measurements came from a normal population. Calculate the expected frequency for the interval 80 and higher.

• A)5.00
• B)12.50
• C)2.80
• D)22.21

---

Definitions:

Manganese Oxides

Compounds of manganese with oxygen, often found as minerals that can form in soils and sedimentary rocks.

Calcium Carbonate

A chemical compound with the formula CaCO3, found in rocks as the minerals calcite and aragonite and is the main component of pearls and the shells of marine organisms, snails, and eggs.

Caliche

A soil-related accumulation of calcareous material that cements sand, gravel, and other materials, commonly forming a hard layer.

Landscape Features

Physical attributes of the land surface, including mountains, rivers, plains, and valleys.