A Confidence Interval Was Used to Estimate the Proportion of Statistics

question 164

Multiple Choice

A confidence interval was used to estimate the proportion of statistics students that are females. A random sample of 72 statistics students generated the following 90% confidence interval: (0.438, 0.642) . Based on the interval above, is the population proportion of females equal to 0.60?

• A) No, and we are 90% sure of it.
• B) No. The proportion is 54.17%.
• C) Maybe. 0.60 is a believable value of the population proportion based on the information above.
• D) Yes, and we are 90% sure of it.

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Definitions:

Single Phase Loads

Electrical loads operating with a single phase power supply, characterized by the use of two wires: one power wire and one neutral wire.

Three Wire Wye

A three-phase power configuration where three branches in a circuit are connected at a common point, resembling the letter Y.

High Leg

In electrical systems, a term referring to a conductor in a delta connection that has a higher voltage with respect to ground than the other two conductors.

Open Delta

A transformer connection method using two transformers to form a delta configuration, typically used when one transformer of a three-phase system is out of service or for economy in a lightly loaded system.