A Manager Wants to Determine the Proportion of Time a Cashier

question 105

Multiple Choice

A manager wants to determine the proportion of time a cashier is idle. A work sampling method was used, and the idle time was found to be 20 percent based on 100 observations. If the manager wants a + 0.05 with a 95 percent confidence level (z = 1.96) , how many MORE observations are needed?

• A) fewer than or equal to 200
• B) greater than 200 but fewer than or equal to 300
• C) greater than 300 but fewer than or equal to 400
• D) greater than 400

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Definitions:

Cervical

Pertaining to the neck or the cervix, the lower, narrow part of the uterus.

Estimated Date of Confinement (EDC)

The expected due date for a pregnant woman to give birth.

Ultrasonography

A diagnostic imaging technique using ultrasound waves to visualize internal organs, tissues, or blood flow for medical examination.

Trimester

One of the three parts into which pregnancy is divided, each lasting about three months, used to monitor fetal development and maternal health.