Suppose That the Store Chain of Electronics Plus Sells Extended

question 5

Essay

Suppose that the store chain of Electronics Plus sells extended warranties to 20% of
customers who purchase electronic devices. A local Seattle store samples 300 customers
from their data base.
A. What proportion of customers would they expect to have purchased extended
warranties?
b. What is the standard deviation of the sample proportion?
c. What shape would you expect the sampling distribution of the proportion to have?
d. Would you be surprised to find out that in a sample of 300, 40 of the customers
purchased extended warranties? Explain. What might account for this high percentage?

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Definitions:

Primary Producers

Organisms, usually plants and algae, that can produce their own food through photosynthesis, forming the base of the food web.

Headwater Streams

The upper tributaries of a river system, crucial for maintaining the health of the entire ecosystem.

Ecological Services

The benefits that humans receive from natural ecosystems, including pollination, water purification, and climate regulation.

Economic Services

Economic services are activities that generate economic value or provide support to the economic infrastructure, including banking, retail, transportation, and healthcare.