A Random Sample of 150 Employees Was Selected

question 44

Multiple Choice

A random sample of 150 employees was selected. There are 60 employees older than 30 in the sample. Estimate the proportion of all employees of the company who are older than 30 with a 50% confidence. ​

• A) We can be 50% confident that the true proportion of all employees of the company who are older than 30 is 0.4.
• B) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.334, 0.466).
• C) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.322, 0.478).
• D) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.38, 0.42).
• E) We can be 50% confident that the true proportion of all employees of the company who are older than 30 falls within the interval (0.36, 0.44).

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Definitions:

Product Variety

The range of different products or services offered by a company to meet various customer needs and preferences.

Distribution Network

A system of warehouses, transport services, and distribution centers that facilitates the movement of products from manufacturers to consumers.

Manufacturer

A company or individual that produces finished goods from raw materials using various processes, tools, and machinery.

Economies Of Scale

The cost advantage achieved by an increase in production, leading to a lower cost per unit.