A Survey of 50 Retail Stores Revealed That the Average

question 59

Multiple Choice

A survey of 50 retail stores revealed that the average price of a microwave was $375,with a sample standard deviation of $20. If 90% and 95% confidence intervals were developed to estimate the true cost of the microwave,what similarities would they have?

• A)Both have the same confidence level.
• B)Both use the same t-statistic.
• C)Both use the same z-statistic.
• D)Both use the same point estimate of the population mean.

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Definitions:

Capacitor-start Capacitor-run Motor

A type of single-phase induction motor that uses a capacitor in both the starting and running circuits for better efficiency and torque.

Continental Army

The revolutionary war army authorized by the Continental Congress in 1775, led by General George Washington, to fight against British rule during the American Revolution.

Declaration of Independence

A seminal document adopted on July 4, 1776, by the thirteen American colonies declaring their independence from British rule.