A Research Firm Wants to Compute an Interval Estimate with 90

question 9

Multiple Choice

A research firm wants to compute an interval estimate with 90% confidence for the mean time to complete an employment test. Assuming a population standard deviation of three hours,what is the required sample size if the error should be less than a half hour?

• A)196
• B)98
• C)10
• D)16

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Definitions:

Mendez V. Westminster

A landmark 1947 court case that challenged racial segregation in California schools, paving the way for desegregation.

TV Advertisements

A form of marketing communication used to promote or sell a product, service, or idea through television broadcasting.

Levittown

A symbol of post-World War II suburbia and one of the first mass-produced suburban housing developments in the United States.

John F. Kennedy

The 35th President of the United States, serving from January 1961 until his assassination in November 1963, known for his efforts to launch the Peace Corps, initiate the process of civil rights legislation, and manage the Cuban Missile Crisis.