In Testing the Difference Between Two Population Means Using Two

question 40

Multiple Choice

In testing the difference between two population means using two independent samples, we use the pooled variance in estimating the standard error of the sampling distribution of the sample mean difference if:

• A)the sample sizes are both large.
• B)the populations are normal with equal variances.
• C)the populations are non-normal with unequal variances.
• D)All of these choices are true.

---

Definitions:

Conductors

Materials that allow the flow of electrical current, commonly used in electrical wiring and electronics for the transmission of electricity.

Voltage Drop

A decrease in electrical potential along the path of a current through a circuit.

Ohm Resistor

An electrical component that opposes the flow of current, defined by its resistance value in ohms.

Voltage Drops

The reduction in electrical potential measured across a component or conductor when current is flowing, indicative of resistance or impedance.