A Simple Random Sample of 45 Elements Has Been Selected

question 18

Multiple Choice

A simple random sample of 45 elements has been selected from a population of size 800. The sample mean is 500, and the sample standard deviation is 60. The standard error of the mean is

• A) 8.9
• B) 62.7
• C) 1.6
• D) 8.7

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Definitions:

Life Expectancy

Refers to the average number of years that a person is expected to live based on demographic factors like their year of birth, current age, and gender.

Democratic Republic of the Congo

A country located in Central Africa, known for its rich natural resources and complex political history.

Clean Drinking Water

Water that is safe for consumption, free from contaminants and pollutants, essential for health and wellbeing.

Lack Access

The condition of being unable to reach, use, or benefit from resources, services, or opportunities, often due to various barriers.